18978625

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:226

約数の個数: 32

約数和(自身を含む): 25534080

約数和(自身を除く): 6555455

約数列:

[1, 5, 19, 25, 61, 95, 125, 131, 305, 475, 655, 1159, 1525, 2375, 2489, 3275, 5795, 7625, 7991, 12445, 16375, 28975, 39955, 62225, 144875, 151829, 199775, 311125, 759145, 998875, 3795725, 18978625]

約数ペア:

[(1, 18978625), (5, 3795725), (19, 998875), (25, 759145), (61, 311125), (95, 199775), (125, 151829), (131, 144875), (305, 62225), (475, 39955), (655, 28975), (1159, 16375), (1525, 12445), (2375, 7991), (2489, 7625), (3275, 5795)]