20631280

素因数分解:

$2^4\times 5^1\times {\mathrm{463}}^1\times {\mathrm{557}}^1$

素因数の和:1033

約数の個数: 40

約数和(自身を含む): 48157632

約数和(自身を除く): 27526352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 463, 557, 926, 1114, 1852, 2228, 2315, 2785, 3704, 4456, 4630, 5570, 7408, 8912, 9260, 11140, 18520, 22280, 37040, 44560, 257891, 515782, 1031564, 1289455, 2063128, 2578910, 4126256, 5157820, 10315640, 20631280]

約数ペア:

[(1, 20631280), (2, 10315640), (4, 5157820), (5, 4126256), (8, 2578910), (10, 2063128), (16, 1289455), (20, 1031564), (40, 515782), (80, 257891), (463, 44560), (557, 37040), (926, 22280), (1114, 18520), (1852, 11140), (2228, 9260), (2315, 8912), (2785, 7408), (3704, 5570), (4456, 4630)]