256963840

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{241}}^1$

素因数の和:293

約数の個数: 216

約数和(自身を含む): 761263272

約数和(自身を除く): 504299432

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 49, 56, 64, 68, 70, 80, 85, 98, 112, 119, 128, 136, 140, 160, 170, 196, 224, 238, 241, 245, 256, 272, 280, 320, 340, 392, 448, 476, 482, 490, 544, 560, 595, 640, 680, 784, 833, 896, 952, 964, 980, 1088, 1120, 1190, 1205, 1280, 1360, 1568, 1666, 1687, 1792, 1904, 1928, 1960, 2176, 2240, 2380, 2410, 2720, 3136, 3332, 3374, 3808, 3856, 3920, 4097, 4165, 4352, 4480, 4760, 4820, 5440, 6272, 6664, 6748, 7616, 7712, 7840, 8194, 8330, 8435, 8960, 9520, 9640, 10880, 11809, 12544, 13328, 13496, 15232, 15424, 15680, 16388, 16660, 16870, 19040, 19280, 20485, 21760, 23618, 26656, 26992, 28679, 30464, 30848, 31360, 32776, 33320, 33740, 38080, 38560, 40970, 47236, 53312, 53984, 57358, 59045, 61696, 62720, 65552, 66640, 67480, 76160, 77120, 81940, 94472, 106624, 107968, 114716, 118090, 131104, 133280, 134960, 143395, 152320, 154240, 163880, 188944, 200753, 213248, 215936, 229432, 236180, 262208, 266560, 269920, 286790, 308480, 327760, 377888, 401506, 431872, 458864, 472360, 524416, 533120, 539840, 573580, 655520, 755776, 803012, 917728, 944720, 1003765, 1048832, 1066240, 1079680, 1147160, 1311040, 1511552, 1606024, 1835456, 1889440, 2007530, 2159360, 2294320, 2622080, 3023104, 3212048, 3670912, 3778880, 4015060, 4588640, 5244160, 6424096, 7341824, 7557760, 8030120, 9177280, 12848192, 15115520, 16060240, 18354560, 25696384, 32120480, 36709120, 51392768, 64240960, 128481920, 256963840]

約数ペア:

[(1, 256963840), (2, 128481920), (4, 64240960), (5, 51392768), (7, 36709120), (8, 32120480), (10, 25696384), (14, 18354560), (16, 16060240), (17, 15115520), (20, 12848192), (28, 9177280), (32, 8030120), (34, 7557760), (35, 7341824), (40, 6424096), (49, 5244160), (56, 4588640), (64, 4015060), (68, 3778880), (70, 3670912), (80, 3212048), (85, 3023104), (98, 2622080), (112, 2294320), (119, 2159360), (128, 2007530), (136, 1889440), (140, 1835456), (160, 1606024), (170, 1511552), (196, 1311040), (224, 1147160), (238, 1079680), (241, 1066240), (245, 1048832), (256, 1003765), (272, 944720), (280, 917728), (320, 803012), (340, 755776), (392, 655520), (448, 573580), (476, 539840), (482, 533120), (490, 524416), (544, 472360), (560, 458864), (595, 431872), (640, 401506), (680, 377888), (784, 327760), (833, 308480), (896, 286790), (952, 269920), (964, 266560), (980, 262208), (1088, 236180), (1120, 229432), (1190, 215936), (1205, 213248), (1280, 200753), (1360, 188944), (1568, 163880), (1666, 154240), (1687, 152320), (1792, 143395), (1904, 134960), (1928, 133280), (1960, 131104), (2176, 118090), (2240, 114716), (2380, 107968), (2410, 106624), (2720, 94472), (3136, 81940), (3332, 77120), (3374, 76160), (3808, 67480), (3856, 66640), (3920, 65552), (4097, 62720), (4165, 61696), (4352, 59045), (4480, 57358), (4760, 53984), (4820, 53312), (5440, 47236), (6272, 40970), (6664, 38560), (6748, 38080), (7616, 33740), (7712, 33320), (7840, 32776), (8194, 31360), (8330, 30848), (8435, 30464), (8960, 28679), (9520, 26992), (9640, 26656), (10880, 23618), (11809, 21760), (12544, 20485), (13328, 19280), (13496, 19040), (15232, 16870), (15424, 16660), (15680, 16388)]