21207845

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 27907200

約数和(自身を除く): 6699355

約数列:

[1, 5, 29, 37, 59, 67, 145, 185, 295, 335, 1073, 1711, 1943, 2183, 2479, 3953, 5365, 8555, 9715, 10915, 12395, 19765, 63307, 71891, 114637, 146261, 316535, 359455, 573185, 731305, 4241569, 21207845]

約数ペア:

[(1, 21207845), (5, 4241569), (29, 731305), (37, 573185), (59, 359455), (67, 316535), (145, 146261), (185, 114637), (295, 71891), (335, 63307), (1073, 19765), (1711, 12395), (1943, 10915), (2183, 9715), (2479, 8555), (3953, 5365)]