459980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{211}}^1$

素因数の和:329

約数の個数: 24

約数和(自身を含む): 979440

約数和(自身を除く): 519460

約数列:

[1, 2, 4, 5, 10, 20, 109, 211, 218, 422, 436, 545, 844, 1055, 1090, 2110, 2180, 4220, 22999, 45998, 91996, 114995, 229990, 459980]

約数ペア:

[(1, 459980), (2, 229990), (4, 114995), (5, 91996), (10, 45998), (20, 22999), (109, 4220), (211, 2180), (218, 2110), (422, 1090), (436, 1055), (545, 844)]