18985875

素因数分解:

$3^1\times 5^3\times {\mathrm{197}}^1\times {\mathrm{257}}^1$

素因数の和:472

約数の個数: 32

約数和(自身を含む): 31876416

約数和(自身を除く): 12890541

約数列:

[1, 3, 5, 15, 25, 75, 125, 197, 257, 375, 591, 771, 985, 1285, 2955, 3855, 4925, 6425, 14775, 19275, 24625, 32125, 50629, 73875, 96375, 151887, 253145, 759435, 1265725, 3797175, 6328625, 18985875]

約数ペア:

[(1, 18985875), (3, 6328625), (5, 3797175), (15, 1265725), (25, 759435), (75, 253145), (125, 151887), (197, 96375), (257, 73875), (375, 50629), (591, 32125), (771, 24625), (985, 19275), (1285, 14775), (2955, 6425), (3855, 4925)]