19915721255

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{409}}^1\times {\mathrm{572867}}^1$

素因数の和:573298

約数の個数: 16

約数和(自身を含む): 25366595040

約数和(自身を除く): 5450873785

約数列:

[1, 5, 17, 85, 409, 2045, 6953, 34765, 572867, 2864335, 9738739, 48693695, 234302603, 1171513015, 3983144251, 19915721255]

約数ペア:

[(1, 19915721255), (5, 3983144251), (17, 1171513015), (85, 234302603), (409, 48693695), (2045, 9738739), (6953, 2864335), (34765, 572867)]