20117140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 44319744

約数和(自身を除く): 24202604

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 284, 310, 355, 457, 620, 710, 914, 1420, 1828, 2201, 2285, 4402, 4570, 8804, 9140, 11005, 14167, 22010, 28334, 32447, 44020, 56668, 64894, 70835, 129788, 141670, 162235, 283340, 324470, 648940, 1005857, 2011714, 4023428, 5029285, 10058570, 20117140]

約数ペア:

[(1, 20117140), (2, 10058570), (4, 5029285), (5, 4023428), (10, 2011714), (20, 1005857), (31, 648940), (62, 324470), (71, 283340), (124, 162235), (142, 141670), (155, 129788), (284, 70835), (310, 64894), (355, 56668), (457, 44020), (620, 32447), (710, 28334), (914, 22010), (1420, 14167), (1828, 11005), (2201, 9140), (2285, 8804), (4402, 4570)]