17938221

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 10428627

約数列:

[1, 3, 7, 21, 53, 71, 159, 213, 227, 371, 497, 681, 1113, 1491, 1589, 3763, 4767, 11289, 12031, 16117, 26341, 36093, 48351, 79023, 84217, 112819, 252651, 338457, 854201, 2562603, 5979407, 17938221]

約数ペア:

[(1, 17938221), (3, 5979407), (7, 2562603), (21, 854201), (53, 338457), (71, 252651), (159, 112819), (213, 84217), (227, 79023), (371, 48351), (497, 36093), (681, 26341), (1113, 16117), (1491, 12031), (1589, 11289), (3763, 4767)]