221661561

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{379}}^1\times {\mathrm{479}}^1$

素因数の和:909

約数の個数: 32

約数和(自身を含む): 332697600

約数和(自身を除く): 111036039

約数列:

[1, 3, 11, 33, 37, 111, 379, 407, 479, 1137, 1221, 1437, 4169, 5269, 12507, 14023, 15807, 17723, 42069, 53169, 154253, 181541, 194953, 462759, 544623, 584859, 1996951, 5990853, 6717017, 20151051, 73887187, 221661561]

約数ペア:

[(1, 221661561), (3, 73887187), (11, 20151051), (33, 6717017), (37, 5990853), (111, 1996951), (379, 584859), (407, 544623), (479, 462759), (1137, 194953), (1221, 181541), (1437, 154253), (4169, 53169), (5269, 42069), (12507, 17723), (14023, 15807)]