64827640

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{7681}}^1$

素因数の和:7903

約数の個数: 32

約数和(自身を含む): 146572560

約数和(自身を除く): 81744920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 7681, 8440, 15362, 30724, 38405, 61448, 76810, 153620, 307240, 1620691, 3241382, 6482764, 8103455, 12965528, 16206910, 32413820, 64827640]

約数ペア:

[(1, 64827640), (2, 32413820), (4, 16206910), (5, 12965528), (8, 8103455), (10, 6482764), (20, 3241382), (40, 1620691), (211, 307240), (422, 153620), (844, 76810), (1055, 61448), (1688, 38405), (2110, 30724), (4220, 15362), (7681, 8440)]