20780560

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{617}}^1$

素因数の和:1051

約数の個数: 40

約数和(自身を含む): 48508056

約数和(自身を除く): 27727496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 617, 842, 1234, 1684, 2105, 2468, 3085, 3368, 4210, 4936, 6170, 6736, 8420, 9872, 12340, 16840, 24680, 33680, 49360, 259757, 519514, 1039028, 1298785, 2078056, 2597570, 4156112, 5195140, 10390280, 20780560]

約数ペア:

[(1, 20780560), (2, 10390280), (4, 5195140), (5, 4156112), (8, 2597570), (10, 2078056), (16, 1298785), (20, 1039028), (40, 519514), (80, 259757), (421, 49360), (617, 33680), (842, 24680), (1234, 16840), (1684, 12340), (2105, 9872), (2468, 8420), (3085, 6736), (3368, 6170), (4210, 4936)]