21905204

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{563}}^1$

素因数の和:775

約数の個数: 24

約数和(自身を含む): 39227328

約数和(自身を除く): 17322124

約数列:

[1, 2, 4, 71, 137, 142, 274, 284, 548, 563, 1126, 2252, 9727, 19454, 38908, 39973, 77131, 79946, 154262, 159892, 308524, 5476301, 10952602, 21905204]

約数ペア:

[(1, 21905204), (2, 10952602), (4, 5476301), (71, 308524), (137, 159892), (142, 154262), (274, 79946), (284, 77131), (548, 39973), (563, 38908), (1126, 19454), (2252, 9727)]