21937580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2207}}^1$

素因数の和:2294

約数の個数: 48

約数和(自身を含む): 53415936

約数和(自身を除く): 31478356

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2207, 2485, 4414, 4970, 8828, 9940, 11035, 15449, 22070, 30898, 44140, 61796, 77245, 154490, 156697, 308980, 313394, 626788, 783485, 1096879, 1566970, 2193758, 3133940, 4387516, 5484395, 10968790, 21937580]

約数ペア:

[(1, 21937580), (2, 10968790), (4, 5484395), (5, 4387516), (7, 3133940), (10, 2193758), (14, 1566970), (20, 1096879), (28, 783485), (35, 626788), (70, 313394), (71, 308980), (140, 156697), (142, 154490), (284, 77245), (355, 61796), (497, 44140), (710, 30898), (994, 22070), (1420, 15449), (1988, 11035), (2207, 9940), (2485, 8828), (4414, 4970)]