19749925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{907}}^1$

素因数の和:997

約数の個数: 24

約数和(自身を含む): 26796896

約数和(自身を除く): 7046971

約数列:

[1, 5, 13, 25, 65, 67, 325, 335, 871, 907, 1675, 4355, 4535, 11791, 21775, 22675, 58955, 60769, 294775, 303845, 789997, 1519225, 3949985, 19749925]

約数ペア:

[(1, 19749925), (5, 3949985), (13, 1519225), (25, 789997), (65, 303845), (67, 294775), (325, 60769), (335, 58955), (871, 22675), (907, 21775), (1675, 11791), (4355, 4535)]