18988879820

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{3972569}}^1$

素因数の和:3972817

約数の個数: 24

約数和(自身を含む): 40043505600

約数和(自身を除く): 21054625780

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4780, 3972569, 7945138, 15890276, 19862845, 39725690, 79451380, 949443991, 1898887982, 3797775964, 4747219955, 9494439910, 18988879820]

約数ペア:

[(1, 18988879820), (2, 9494439910), (4, 4747219955), (5, 3797775964), (10, 1898887982), (20, 949443991), (239, 79451380), (478, 39725690), (956, 19862845), (1195, 15890276), (2390, 7945138), (4780, 3972569)]