21290211

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{557}}^1$

素因数の和:731

約数の個数: 24

約数和(自身を含む): 32033664

約数和(自身を除く): 10743453

約数列:

[1, 3, 9, 31, 93, 137, 279, 411, 557, 1233, 1671, 4247, 5013, 12741, 17267, 38223, 51801, 76309, 155403, 228927, 686781, 2365579, 7096737, 21290211]

約数ペア:

[(1, 21290211), (3, 7096737), (9, 2365579), (31, 686781), (93, 228927), (137, 155403), (279, 76309), (411, 51801), (557, 38223), (1233, 17267), (1671, 12741), (4247, 5013)]