21316405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{6569}}^1$

素因数の和:6644

約数の個数: 16

約数和(自身を含む): 28382400

約数和(自身を除く): 7065995

約数列:

[1, 5, 11, 55, 59, 295, 649, 3245, 6569, 32845, 72259, 361295, 387571, 1937855, 4263281, 21316405]

約数ペア:

[(1, 21316405), (5, 4263281), (11, 1937855), (55, 387571), (59, 361295), (295, 72259), (649, 32845), (3245, 6569)]