21758997

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:957

約数の個数: 32

約数和(自身を含む): 34013952

約数和(自身を除く): 12254955

約数列:

[1, 3, 13, 17, 37, 39, 51, 111, 221, 481, 629, 663, 887, 1443, 1887, 2661, 8177, 11531, 15079, 24531, 32819, 34593, 45237, 98457, 196027, 426647, 557923, 588081, 1279941, 1673769, 7252999, 21758997]

約数ペア:

[(1, 21758997), (3, 7252999), (13, 1673769), (17, 1279941), (37, 588081), (39, 557923), (51, 426647), (111, 196027), (221, 98457), (481, 45237), (629, 34593), (663, 32819), (887, 24531), (1443, 15079), (1887, 11531), (2661, 8177)]