21159305

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{2797}}^1$

素因数の和:2908

約数の個数: 16

約数和(自身を含む): 27196560

約数和(自身を除く): 6037255

約数列:

[1, 5, 17, 85, 89, 445, 1513, 2797, 7565, 13985, 47549, 237745, 248933, 1244665, 4231861, 21159305]

約数ペア:

[(1, 21159305), (5, 4231861), (17, 1244665), (85, 248933), (89, 237745), (445, 47549), (1513, 13985), (2797, 7565)]