20399480

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2417}}^1$

素因数の和:2639

約数の個数: 32

約数和(自身を含む): 46135440

約数和(自身を除く): 25735960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2417, 4220, 4834, 8440, 9668, 12085, 19336, 24170, 48340, 96680, 509987, 1019974, 2039948, 2549935, 4079896, 5099870, 10199740, 20399480]

約数ペア:

[(1, 20399480), (2, 10199740), (4, 5099870), (5, 4079896), (8, 2549935), (10, 2039948), (20, 1019974), (40, 509987), (211, 96680), (422, 48340), (844, 24170), (1055, 19336), (1688, 12085), (2110, 9668), (2417, 8440), (4220, 4834)]