21696171

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3989}}^1$

素因数の和:4043

約数の個数: 24

約数和(自身を含む): 34569360

約数和(自身を除く): 12873189

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3989, 5439, 11967, 27923, 83769, 147593, 195461, 442779, 586383, 1033151, 3099453, 7232057, 21696171]

約数ペア:

[(1, 21696171), (3, 7232057), (7, 3099453), (21, 1033151), (37, 586383), (49, 442779), (111, 195461), (147, 147593), (259, 83769), (777, 27923), (1813, 11967), (3989, 5439)]