21218973

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{1511}}^1$

素因数の和:1696

約数の個数: 16

約数和(自身を含む): 29417472

約数和(自身を除く): 8198499

約数列:

[1, 3, 31, 93, 151, 453, 1511, 4533, 4681, 14043, 46841, 140523, 228161, 684483, 7072991, 21218973]

約数ペア:

[(1, 21218973), (3, 7072991), (31, 684483), (93, 228161), (151, 140523), (453, 46841), (1511, 14043), (4533, 4681)]