19802645

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{509}}^1$

素因数の和:796

約数の個数: 16

約数和(自身を含む): 24675840

約数和(自身を除く): 4873195

約数列:

[1, 5, 31, 155, 251, 509, 1255, 2545, 7781, 15779, 38905, 78895, 127759, 638795, 3960529, 19802645]

約数ペア:

[(1, 19802645), (5, 3960529), (31, 638795), (155, 127759), (251, 78895), (509, 38905), (1255, 15779), (2545, 7781)]