20400075

素因数分解:

$3^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1277}}^1$

素因数の和:1364

約数の個数: 36

約数和(自身を含む): 37082448

約数和(自身を除く): 16682373

約数列:

[1, 3, 5, 9, 15, 25, 45, 71, 75, 213, 225, 355, 639, 1065, 1277, 1775, 3195, 3831, 5325, 6385, 11493, 15975, 19155, 31925, 57465, 90667, 95775, 272001, 287325, 453335, 816003, 1360005, 2266675, 4080015, 6800025, 20400075]

約数ペア:

[(1, 20400075), (3, 6800025), (5, 4080015), (9, 2266675), (15, 1360005), (25, 816003), (45, 453335), (71, 287325), (75, 272001), (213, 95775), (225, 90667), (355, 57465), (639, 31925), (1065, 19155), (1277, 15975), (1775, 11493), (3195, 6385), (3831, 5325)]