19985600

素因数分解:

$2^6\times 5^2\times {\mathrm{12491}}^1$

素因数の和:12513

約数の個数: 42

約数和(自身を含む): 49181004

約数和(自身を除く): 29195404

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 12491, 24982, 49964, 62455, 99928, 124910, 199856, 249820, 312275, 399712, 499640, 624550, 799424, 999280, 1249100, 1998560, 2498200, 3997120, 4996400, 9992800, 19985600]

約数ペア:

[(1, 19985600), (2, 9992800), (4, 4996400), (5, 3997120), (8, 2498200), (10, 1998560), (16, 1249100), (20, 999280), (25, 799424), (32, 624550), (40, 499640), (50, 399712), (64, 312275), (80, 249820), (100, 199856), (160, 124910), (200, 99928), (320, 62455), (400, 49964), (800, 24982), (1600, 12491)]