21889371

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 34587648

約数和(自身を除く): 12698277

約数列:

[1, 3, 7, 21, 53, 71, 159, 213, 277, 371, 497, 831, 1113, 1491, 1939, 3763, 5817, 11289, 14681, 19667, 26341, 44043, 59001, 79023, 102767, 137669, 308301, 413007, 1042351, 3127053, 7296457, 21889371]

約数ペア:

[(1, 21889371), (3, 7296457), (7, 3127053), (21, 1042351), (53, 413007), (71, 308301), (159, 137669), (213, 102767), (277, 79023), (371, 59001), (497, 44043), (831, 26341), (1113, 19667), (1491, 14681), (1939, 11289), (3763, 5817)]