21145293

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{467}}^1$

素因数の和:535

約数の個数: 40

約数和(自身を含む): 34882848

約数和(自身を除く): 13737555

約数列:

[1, 3, 9, 13, 27, 39, 43, 81, 117, 129, 351, 387, 467, 559, 1053, 1161, 1401, 1677, 3483, 4203, 5031, 6071, 12609, 15093, 18213, 20081, 37827, 45279, 54639, 60243, 163917, 180729, 261053, 491751, 542187, 783159, 1626561, 2349477, 7048431, 21145293]

約数ペア:

[(1, 21145293), (3, 7048431), (9, 2349477), (13, 1626561), (27, 783159), (39, 542187), (43, 491751), (81, 261053), (117, 180729), (129, 163917), (351, 60243), (387, 54639), (467, 45279), (559, 37827), (1053, 20081), (1161, 18213), (1401, 15093), (1677, 12609), (3483, 6071), (4203, 5031)]