21124275

素因数分解:

$3^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{3967}}^1$

素因数の和:4051

約数の個数: 24

約数和(自身を含む): 35426304

約数和(自身を除く): 14302029

約数列:

[1, 3, 5, 15, 25, 71, 75, 213, 355, 1065, 1775, 3967, 5325, 11901, 19835, 59505, 99175, 281657, 297525, 844971, 1408285, 4224855, 7041425, 21124275]

約数ペア:

[(1, 21124275), (3, 7041425), (5, 4224855), (15, 1408285), (25, 844971), (71, 297525), (75, 281657), (213, 99175), (355, 59505), (1065, 19835), (1775, 11901), (3967, 5325)]