21016809

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{4937}}^1$

素因数の和:4997

約数の個数: 24

約数和(自身を含む): 33894432

約数和(自身を除く): 12877623

約数列:

[1, 3, 9, 11, 33, 43, 99, 129, 387, 473, 1419, 4257, 4937, 14811, 44433, 54307, 162921, 212291, 488763, 636873, 1910619, 2335201, 7005603, 21016809]

約数ペア:

[(1, 21016809), (3, 7005603), (9, 2335201), (11, 1910619), (33, 636873), (43, 488763), (99, 212291), (129, 162921), (387, 54307), (473, 44433), (1419, 14811), (4257, 4937)]