21065541

素因数分解:

$3^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{3049}}^1$

素因数の和:3113

約数の個数: 24

約数和(自身を含む): 33379200

約数和(自身を除く): 12313659

約数列:

[1, 3, 7, 21, 47, 49, 141, 147, 329, 987, 2303, 3049, 6909, 9147, 21343, 64029, 143303, 149401, 429909, 448203, 1003121, 3009363, 7021847, 21065541]

約数ペア:

[(1, 21065541), (3, 7021847), (7, 3009363), (21, 1003121), (47, 448203), (49, 429909), (141, 149401), (147, 143303), (329, 64029), (987, 21343), (2303, 9147), (3049, 6909)]