261216123

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{3617}}^1$

素因数の和:3827

約数の個数: 32

約数和(自身を含む): 421424640

約数和(自身を除く): 160208517

約数列:

[1, 3, 7, 19, 21, 57, 133, 181, 399, 543, 1267, 3439, 3617, 3801, 10317, 10851, 24073, 25319, 68723, 72219, 75957, 206169, 481061, 654677, 1443183, 1964031, 4582739, 12438863, 13748217, 37316589, 87072041, 261216123]

約数ペア:

[(1, 261216123), (3, 87072041), (7, 37316589), (19, 13748217), (21, 12438863), (57, 4582739), (133, 1964031), (181, 1443183), (399, 654677), (543, 481061), (1267, 206169), (3439, 75957), (3617, 72219), (3801, 68723), (10317, 25319), (10851, 24073)]