201721640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{123001}}^1$

素因数の和:123053

約数の個数: 32

約数和(自身を含む): 464947560

約数和(自身を除く): 263225920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 123001, 246002, 492004, 615005, 984008, 1230010, 2460020, 4920040, 5043041, 10086082, 20172164, 25215205, 40344328, 50430410, 100860820, 201721640]

約数ペア:

[(1, 201721640), (2, 100860820), (4, 50430410), (5, 40344328), (8, 25215205), (10, 20172164), (20, 10086082), (40, 5043041), (41, 4920040), (82, 2460020), (164, 1230010), (205, 984008), (328, 615005), (410, 492004), (820, 246002), (1640, 123001)]