2147980

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{509}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 4541040

約数和(自身を除く): 2393060

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 509, 844, 1018, 1055, 2036, 2110, 2545, 4220, 5090, 10180, 107399, 214798, 429596, 536995, 1073990, 2147980]

約数ペア:

[(1, 2147980), (2, 1073990), (4, 536995), (5, 429596), (10, 214798), (20, 107399), (211, 10180), (422, 5090), (509, 4220), (844, 2545), (1018, 2110), (1055, 2036)]