21210213

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 31190400

約数和(自身を除く): 9980187

約数列:

[1, 3, 19, 37, 57, 89, 111, 113, 267, 339, 703, 1691, 2109, 2147, 3293, 4181, 5073, 6441, 9879, 10057, 12543, 30171, 62567, 79439, 187701, 191083, 238317, 372109, 573249, 1116327, 7070071, 21210213]

約数ペア:

[(1, 21210213), (3, 7070071), (19, 1116327), (37, 573249), (57, 372109), (89, 238317), (111, 191083), (113, 187701), (267, 79439), (339, 62567), (703, 30171), (1691, 12543), (2109, 10057), (2147, 9879), (3293, 6441), (4181, 5073)]