7988240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{7681}}^1$

素因数の和:7707

約数の個数: 40

約数和(自身を含む): 20003928

約数和(自身を除く): 12015688

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 7681, 15362, 30724, 38405, 61448, 76810, 99853, 122896, 153620, 199706, 307240, 399412, 499265, 614480, 798824, 998530, 1597648, 1997060, 3994120, 7988240]

約数ペア:

[(1, 7988240), (2, 3994120), (4, 1997060), (5, 1597648), (8, 998530), (10, 798824), (13, 614480), (16, 499265), (20, 399412), (26, 307240), (40, 199706), (52, 153620), (65, 122896), (80, 99853), (104, 76810), (130, 61448), (208, 38405), (260, 30724), (520, 15362), (1040, 7681)]