19661425

素因数分解:

$5^2\times 7^1\times {\mathrm{283}}^1\times {\mathrm{397}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 28031936

約数和(自身を除く): 8370511

約数列:

[1, 5, 7, 25, 35, 175, 283, 397, 1415, 1981, 1985, 2779, 7075, 9905, 9925, 13895, 49525, 69475, 112351, 561755, 786457, 2808775, 3932285, 19661425]

約数ペア:

[(1, 19661425), (5, 3932285), (7, 2808775), (25, 786457), (35, 561755), (175, 112351), (283, 69475), (397, 49525), (1415, 13895), (1981, 9925), (1985, 9905), (2779, 7075)]