18040840

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{2767}}^1$

素因数の和:2941

約数の個数: 32

約数和(自身を含む): 40855680

約数和(自身を除く): 22814840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 2767, 3260, 5534, 6520, 11068, 13835, 22136, 27670, 55340, 110680, 451021, 902042, 1804084, 2255105, 3608168, 4510210, 9020420, 18040840]

約数ペア:

[(1, 18040840), (2, 9020420), (4, 4510210), (5, 3608168), (8, 2255105), (10, 1804084), (20, 902042), (40, 451021), (163, 110680), (326, 55340), (652, 27670), (815, 22136), (1304, 13835), (1630, 11068), (2767, 6520), (3260, 5534)]