21237657

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{811}}^1$

素因数の和:893

約数の個数: 32

約数和(自身を含む): 34298880

約数和(自身を除く): 13061223

約数列:

[1, 3, 7, 21, 29, 43, 87, 129, 203, 301, 609, 811, 903, 1247, 2433, 3741, 5677, 8729, 17031, 23519, 26187, 34873, 70557, 104619, 164633, 244111, 493899, 732333, 1011317, 3033951, 7079219, 21237657]

約数ペア:

[(1, 21237657), (3, 7079219), (7, 3033951), (21, 1011317), (29, 732333), (43, 493899), (87, 244111), (129, 164633), (203, 104619), (301, 70557), (609, 34873), (811, 26187), (903, 23519), (1247, 17031), (2433, 8729), (3741, 5677)]