21887761

素因数分解:

$7^2\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 26511840

約数和(自身を除く): 4624079

約数列:

[1, 7, 49, 59, 67, 113, 413, 469, 791, 2891, 3283, 3953, 5537, 6667, 7571, 27671, 46669, 52997, 193697, 326683, 370979, 446689, 3126823, 21887761]

約数ペア:

[(1, 21887761), (7, 3126823), (49, 446689), (59, 370979), (67, 326683), (113, 193697), (413, 52997), (469, 46669), (791, 27671), (2891, 7571), (3283, 6667), (3953, 5537)]