64812520

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{2909}}^1$

素因数の和:3477

約数の個数: 32

約数和(自身を含む): 146140200

約数和(自身を除く): 81327680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 1114, 2228, 2785, 2909, 4456, 5570, 5818, 11140, 11636, 14545, 22280, 23272, 29090, 58180, 116360, 1620313, 3240626, 6481252, 8101565, 12962504, 16203130, 32406260, 64812520]

約数ペア:

[(1, 64812520), (2, 32406260), (4, 16203130), (5, 12962504), (8, 8101565), (10, 6481252), (20, 3240626), (40, 1620313), (557, 116360), (1114, 58180), (2228, 29090), (2785, 23272), (2909, 22280), (4456, 14545), (5570, 11636), (5818, 11140)]