81669790

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{1021}}^1$

素因数の和:1468

約数の個数: 32

約数和(自身を含む): 155262240

約数和(自身を除く): 73592450

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 421, 842, 1021, 2042, 2105, 4210, 5105, 7999, 10210, 15998, 19399, 38798, 39995, 79990, 96995, 193990, 429841, 859682, 2149205, 4298410, 8166979, 16333958, 40834895, 81669790]

約数ペア:

[(1, 81669790), (2, 40834895), (5, 16333958), (10, 8166979), (19, 4298410), (38, 2149205), (95, 859682), (190, 429841), (421, 193990), (842, 96995), (1021, 79990), (2042, 39995), (2105, 38798), (4210, 19399), (5105, 15998), (7999, 10210)]