389650840

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{137201}}^1$

素因数の和:137283

約数の個数: 32

約数和(自身を含む): 889068960

約数和(自身を除く): 499418120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 137201, 274402, 548804, 686005, 1097608, 1372010, 2744020, 5488040, 9741271, 19482542, 38965084, 48706355, 77930168, 97412710, 194825420, 389650840]

約数ペア:

[(1, 389650840), (2, 194825420), (4, 97412710), (5, 77930168), (8, 48706355), (10, 38965084), (20, 19482542), (40, 9741271), (71, 5488040), (142, 2744020), (284, 1372010), (355, 1097608), (568, 686005), (710, 548804), (1420, 274402), (2840, 137201)]