81284480

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:308

約数の個数: 128

約数和(自身を含む): 213269760

約数和(自身を除く): 131985280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 64, 68, 80, 85, 124, 128, 136, 155, 160, 170, 241, 248, 272, 310, 320, 340, 482, 496, 527, 544, 620, 640, 680, 964, 992, 1054, 1088, 1205, 1240, 1360, 1928, 1984, 2108, 2176, 2410, 2480, 2635, 2720, 3856, 3968, 4097, 4216, 4820, 4960, 5270, 5440, 7471, 7712, 8194, 8432, 9640, 9920, 10540, 10880, 14942, 15424, 16388, 16864, 19280, 19840, 20485, 21080, 29884, 30848, 32776, 33728, 37355, 38560, 40970, 42160, 59768, 65552, 67456, 74710, 77120, 81940, 84320, 119536, 127007, 131104, 149420, 154240, 163880, 168640, 239072, 254014, 262208, 298840, 327760, 337280, 478144, 508028, 524416, 597680, 635035, 655520, 956288, 1016056, 1195360, 1270070, 1311040, 2032112, 2390720, 2540140, 2622080, 4064224, 4781440, 5080280, 8128448, 10160560, 16256896, 20321120, 40642240, 81284480]

約数ペア:

[(1, 81284480), (2, 40642240), (4, 20321120), (5, 16256896), (8, 10160560), (10, 8128448), (16, 5080280), (17, 4781440), (20, 4064224), (31, 2622080), (32, 2540140), (34, 2390720), (40, 2032112), (62, 1311040), (64, 1270070), (68, 1195360), (80, 1016056), (85, 956288), (124, 655520), (128, 635035), (136, 597680), (155, 524416), (160, 508028), (170, 478144), (241, 337280), (248, 327760), (272, 298840), (310, 262208), (320, 254014), (340, 239072), (482, 168640), (496, 163880), (527, 154240), (544, 149420), (620, 131104), (640, 127007), (680, 119536), (964, 84320), (992, 81940), (1054, 77120), (1088, 74710), (1205, 67456), (1240, 65552), (1360, 59768), (1928, 42160), (1984, 40970), (2108, 38560), (2176, 37355), (2410, 33728), (2480, 32776), (2635, 30848), (2720, 29884), (3856, 21080), (3968, 20485), (4097, 19840), (4216, 19280), (4820, 16864), (4960, 16388), (5270, 15424), (5440, 14942), (7471, 10880), (7712, 10540), (8194, 9920), (8432, 9640)]