31319480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:324

約数の個数: 64

約数和(自身を含む): 73180800

約数和(自身を除く): 41861320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 131, 139, 172, 215, 262, 278, 344, 430, 524, 556, 655, 695, 860, 1048, 1112, 1310, 1390, 1720, 2620, 2780, 5240, 5560, 5633, 5977, 11266, 11954, 18209, 22532, 23908, 28165, 29885, 36418, 45064, 47816, 56330, 59770, 72836, 91045, 112660, 119540, 145672, 182090, 225320, 239080, 364180, 728360, 782987, 1565974, 3131948, 3914935, 6263896, 7829870, 15659740, 31319480]

約数ペア:

[(1, 31319480), (2, 15659740), (4, 7829870), (5, 6263896), (8, 3914935), (10, 3131948), (20, 1565974), (40, 782987), (43, 728360), (86, 364180), (131, 239080), (139, 225320), (172, 182090), (215, 145672), (262, 119540), (278, 112660), (344, 91045), (430, 72836), (524, 59770), (556, 56330), (655, 47816), (695, 45064), (860, 36418), (1048, 29885), (1112, 28165), (1310, 23908), (1390, 22532), (1720, 18209), (2620, 11954), (2780, 11266), (5240, 5977), (5560, 5633)]