21779199

素因数分解:

$3^4\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:118

約数の個数: 60

約数和(自身を含む): 37023096

約数和(自身を除く): 15243897

約数列:

[1, 3, 9, 13, 27, 37, 39, 43, 81, 111, 117, 129, 169, 333, 351, 387, 481, 507, 559, 999, 1053, 1161, 1443, 1521, 1591, 1677, 2997, 3483, 4329, 4563, 4773, 5031, 6253, 7267, 12987, 13689, 14319, 15093, 18759, 20683, 21801, 38961, 42957, 45279, 56277, 62049, 65403, 128871, 168831, 186147, 196209, 268879, 506493, 558441, 588627, 806637, 1675323, 2419911, 7259733, 21779199]

約数ペア:

[(1, 21779199), (3, 7259733), (9, 2419911), (13, 1675323), (27, 806637), (37, 588627), (39, 558441), (43, 506493), (81, 268879), (111, 196209), (117, 186147), (129, 168831), (169, 128871), (333, 65403), (351, 62049), (387, 56277), (481, 45279), (507, 42957), (559, 38961), (999, 21801), (1053, 20683), (1161, 18759), (1443, 15093), (1521, 14319), (1591, 13689), (1677, 12987), (2997, 7267), (3483, 6253), (4329, 5031), (4563, 4773)]