15563890

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{4001}}^1$

素因数の和:4397

約数の個数: 16

約数和(自身を含む): 28094040

約数和(自身を除く): 12530150

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 4001, 8002, 20005, 40010, 1556389, 3112778, 7781945, 15563890]

約数ペア:

[(1, 15563890), (2, 7781945), (5, 3112778), (10, 1556389), (389, 40010), (778, 20005), (1945, 8002), (3890, 4001)]