21532880

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:324

約数の個数: 80

約数和(自身を含む): 53996544

約数和(自身を除く): 32463664

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 71, 80, 85, 136, 142, 170, 223, 272, 284, 340, 355, 446, 568, 680, 710, 892, 1115, 1136, 1207, 1360, 1420, 1784, 2230, 2414, 2840, 3568, 3791, 4460, 4828, 5680, 6035, 7582, 8920, 9656, 12070, 15164, 15833, 17840, 18955, 19312, 24140, 30328, 31666, 37910, 48280, 60656, 63332, 75820, 79165, 96560, 126664, 151640, 158330, 253328, 269161, 303280, 316660, 538322, 633320, 1076644, 1266640, 1345805, 2153288, 2691610, 4306576, 5383220, 10766440, 21532880]

約数ペア:

[(1, 21532880), (2, 10766440), (4, 5383220), (5, 4306576), (8, 2691610), (10, 2153288), (16, 1345805), (17, 1266640), (20, 1076644), (34, 633320), (40, 538322), (68, 316660), (71, 303280), (80, 269161), (85, 253328), (136, 158330), (142, 151640), (170, 126664), (223, 96560), (272, 79165), (284, 75820), (340, 63332), (355, 60656), (446, 48280), (568, 37910), (680, 31666), (710, 30328), (892, 24140), (1115, 19312), (1136, 18955), (1207, 17840), (1360, 15833), (1420, 15164), (1784, 12070), (2230, 9656), (2414, 8920), (2840, 7582), (3568, 6035), (3791, 5680), (4460, 4828)]