64939960

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{6173}}^1$

素因数の和:6447

約数の個数: 32

約数和(自身を含む): 146694240

約数和(自身を除く): 81754280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2104, 2630, 5260, 6173, 10520, 12346, 24692, 30865, 49384, 61730, 123460, 246920, 1623499, 3246998, 6493996, 8117495, 12987992, 16234990, 32469980, 64939960]

約数ペア:

[(1, 64939960), (2, 32469980), (4, 16234990), (5, 12987992), (8, 8117495), (10, 6493996), (20, 3246998), (40, 1623499), (263, 246920), (526, 123460), (1052, 61730), (1315, 49384), (2104, 30865), (2630, 24692), (5260, 12346), (6173, 10520)]