21949978

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{359}}^1\times {\mathrm{1609}}^1$

素因数の和:1989

約数の個数: 16

約数和(自身を含む): 34776000

約数和(自身を除く): 12826022

約数列:

[1, 2, 19, 38, 359, 718, 1609, 3218, 6821, 13642, 30571, 61142, 577631, 1155262, 10974989, 21949978]

約数ペア:

[(1, 21949978), (2, 10974989), (19, 1155262), (38, 577631), (359, 61142), (718, 30571), (1609, 13642), (3218, 6821)]