21138925

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{233}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 6716435

約数列:

[1, 5, 19, 25, 95, 191, 233, 475, 955, 1165, 3629, 4427, 4775, 5825, 18145, 22135, 44503, 90725, 110675, 222515, 845557, 1112575, 4227785, 21138925]

約数ペア:

[(1, 21138925), (5, 4227785), (19, 1112575), (25, 845557), (95, 222515), (191, 110675), (233, 90725), (475, 44503), (955, 22135), (1165, 18145), (3629, 5825), (4427, 4775)]