21808917

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3517}}^1$

素因数の和:3589

約数の個数: 24

約数和(自身を含む): 34574904

約数和(自身を除く): 12765987

約数列:

[1, 3, 9, 13, 39, 53, 117, 159, 477, 689, 2067, 3517, 6201, 10551, 31653, 45721, 137163, 186401, 411489, 559203, 1677609, 2423213, 7269639, 21808917]

約数ペア:

[(1, 21808917), (3, 7269639), (9, 2423213), (13, 1677609), (39, 559203), (53, 411489), (117, 186401), (159, 137163), (477, 45721), (689, 31653), (2067, 10551), (3517, 6201)]