21056217

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{349}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 36892800

約数和(自身を除く): 15836583

約数列:

[1, 3, 7, 13, 17, 21, 39, 51, 91, 119, 169, 221, 273, 349, 357, 507, 663, 1047, 1183, 1547, 2443, 2873, 3549, 4537, 4641, 5933, 7329, 8619, 13611, 17799, 20111, 31759, 41531, 58981, 60333, 77129, 95277, 124593, 176943, 231387, 412867, 539903, 1002677, 1238601, 1619709, 3008031, 7018739, 21056217]

約数ペア:

[(1, 21056217), (3, 7018739), (7, 3008031), (13, 1619709), (17, 1238601), (21, 1002677), (39, 539903), (51, 412867), (91, 231387), (119, 176943), (169, 124593), (221, 95277), (273, 77129), (349, 60333), (357, 58981), (507, 41531), (663, 31759), (1047, 20111), (1183, 17799), (1547, 13611), (2443, 8619), (2873, 7329), (3549, 5933), (4537, 4641)]