218978840

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{20201}}^1$

素因数の和:20483

約数の個数: 32

約数和(自身を含む): 494544960

約数和(自身を除く): 275566120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 2168, 2710, 5420, 10840, 20201, 40402, 80804, 101005, 161608, 202010, 404020, 808040, 5474471, 10948942, 21897884, 27372355, 43795768, 54744710, 109489420, 218978840]

約数ペア:

[(1, 218978840), (2, 109489420), (4, 54744710), (5, 43795768), (8, 27372355), (10, 21897884), (20, 10948942), (40, 5474471), (271, 808040), (542, 404020), (1084, 202010), (1355, 161608), (2168, 101005), (2710, 80804), (5420, 40402), (10840, 20201)]