21083680

素因数分解:

$2^5\times 5^1\times {\mathrm{313}}^1\times {\mathrm{421}}^1$

素因数の和:749

約数の個数: 48

約数和(自身を含む): 50088024

約数和(自身を除く): 29004344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 313, 421, 626, 842, 1252, 1565, 1684, 2105, 2504, 3130, 3368, 4210, 5008, 6260, 6736, 8420, 10016, 12520, 13472, 16840, 25040, 33680, 50080, 67360, 131773, 263546, 527092, 658865, 1054184, 1317730, 2108368, 2635460, 4216736, 5270920, 10541840, 21083680]

約数ペア:

[(1, 21083680), (2, 10541840), (4, 5270920), (5, 4216736), (8, 2635460), (10, 2108368), (16, 1317730), (20, 1054184), (32, 658865), (40, 527092), (80, 263546), (160, 131773), (313, 67360), (421, 50080), (626, 33680), (842, 25040), (1252, 16840), (1565, 13472), (1684, 12520), (2105, 10016), (2504, 8420), (3130, 6736), (3368, 6260), (4210, 5008)]