20115921

素因数分解:

$3^1\times 7^3\times {\mathrm{113}}^1\times {\mathrm{173}}^1$

素因数の和:310

約数の個数: 32

約数和(自身を含む): 31737600

約数和(自身を除く): 11621679

約数列:

[1, 3, 7, 21, 49, 113, 147, 173, 339, 343, 519, 791, 1029, 1211, 2373, 3633, 5537, 8477, 16611, 19549, 25431, 38759, 58647, 59339, 116277, 136843, 178017, 410529, 957901, 2873703, 6705307, 20115921]

約数ペア:

[(1, 20115921), (3, 6705307), (7, 2873703), (21, 957901), (49, 410529), (113, 178017), (147, 136843), (173, 116277), (339, 59339), (343, 58647), (519, 38759), (791, 25431), (1029, 19549), (1211, 16611), (2373, 8477), (3633, 5537)]