21857920

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:91

約数の個数: 192

約数和(自身を含む): 65930760

約数和(自身を除く): 44072840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 41, 49, 56, 64, 68, 70, 80, 82, 85, 98, 112, 119, 128, 136, 140, 160, 164, 170, 196, 205, 224, 238, 245, 272, 280, 287, 320, 328, 340, 392, 410, 448, 476, 490, 544, 560, 574, 595, 640, 656, 680, 697, 784, 820, 833, 896, 952, 980, 1088, 1120, 1148, 1190, 1312, 1360, 1394, 1435, 1568, 1640, 1666, 1904, 1960, 2009, 2176, 2240, 2296, 2380, 2624, 2720, 2788, 2870, 3136, 3280, 3332, 3485, 3808, 3920, 4018, 4165, 4480, 4592, 4760, 4879, 5248, 5440, 5576, 5740, 6272, 6560, 6664, 6970, 7616, 7840, 8036, 8330, 9184, 9520, 9758, 10045, 10880, 11152, 11480, 13120, 13328, 13940, 15232, 15680, 16072, 16660, 18368, 19040, 19516, 20090, 22304, 22960, 24395, 26240, 26656, 27880, 31360, 32144, 33320, 34153, 36736, 38080, 39032, 40180, 44608, 45920, 48790, 53312, 55760, 64288, 66640, 68306, 76160, 78064, 80360, 89216, 91840, 97580, 106624, 111520, 128576, 133280, 136612, 156128, 160720, 170765, 183680, 195160, 223040, 257152, 266560, 273224, 312256, 321440, 341530, 390320, 446080, 533120, 546448, 624512, 642880, 683060, 780640, 1092896, 1285760, 1366120, 1561280, 2185792, 2732240, 3122560, 4371584, 5464480, 10928960, 21857920]

約数ペア:

[(1, 21857920), (2, 10928960), (4, 5464480), (5, 4371584), (7, 3122560), (8, 2732240), (10, 2185792), (14, 1561280), (16, 1366120), (17, 1285760), (20, 1092896), (28, 780640), (32, 683060), (34, 642880), (35, 624512), (40, 546448), (41, 533120), (49, 446080), (56, 390320), (64, 341530), (68, 321440), (70, 312256), (80, 273224), (82, 266560), (85, 257152), (98, 223040), (112, 195160), (119, 183680), (128, 170765), (136, 160720), (140, 156128), (160, 136612), (164, 133280), (170, 128576), (196, 111520), (205, 106624), (224, 97580), (238, 91840), (245, 89216), (272, 80360), (280, 78064), (287, 76160), (320, 68306), (328, 66640), (340, 64288), (392, 55760), (410, 53312), (448, 48790), (476, 45920), (490, 44608), (544, 40180), (560, 39032), (574, 38080), (595, 36736), (640, 34153), (656, 33320), (680, 32144), (697, 31360), (784, 27880), (820, 26656), (833, 26240), (896, 24395), (952, 22960), (980, 22304), (1088, 20090), (1120, 19516), (1148, 19040), (1190, 18368), (1312, 16660), (1360, 16072), (1394, 15680), (1435, 15232), (1568, 13940), (1640, 13328), (1666, 13120), (1904, 11480), (1960, 11152), (2009, 10880), (2176, 10045), (2240, 9758), (2296, 9520), (2380, 9184), (2624, 8330), (2720, 8036), (2788, 7840), (2870, 7616), (3136, 6970), (3280, 6664), (3332, 6560), (3485, 6272), (3808, 5740), (3920, 5576), (4018, 5440), (4165, 5248), (4480, 4879), (4592, 4760)]