645789020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1\times {\mathrm{1607}}^1$

素因数の和:1970

約数の個数: 48

約数和(自身を含む): 1380976128

約数和(自身を除く): 735187108

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 283, 284, 355, 566, 710, 1132, 1415, 1420, 1607, 2830, 3214, 5660, 6428, 8035, 16070, 20093, 32140, 40186, 80372, 100465, 114097, 200930, 228194, 401860, 454781, 456388, 570485, 909562, 1140970, 1819124, 2273905, 2281940, 4547810, 9095620, 32289451, 64578902, 129157804, 161447255, 322894510, 645789020]

約数ペア:

[(1, 645789020), (2, 322894510), (4, 161447255), (5, 129157804), (10, 64578902), (20, 32289451), (71, 9095620), (142, 4547810), (283, 2281940), (284, 2273905), (355, 1819124), (566, 1140970), (710, 909562), (1132, 570485), (1415, 456388), (1420, 454781), (1607, 401860), (2830, 228194), (3214, 200930), (5660, 114097), (6428, 100465), (8035, 80372), (16070, 40186), (20093, 32140)]