21956780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{57781}}^1$

素因数の和:57809

約数の個数: 24

約数和(自身を含む): 48536880

約数和(自身を除く): 26580100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 57781, 115562, 231124, 288905, 577810, 1097839, 1155620, 2195678, 4391356, 5489195, 10978390, 21956780]

約数ペア:

[(1, 21956780), (2, 10978390), (4, 5489195), (5, 4391356), (10, 2195678), (19, 1155620), (20, 1097839), (38, 577810), (76, 288905), (95, 231124), (190, 115562), (380, 57781)]