211231780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{133691}}^1$

素因数の和:133779

約数の個数: 24

約数和(自身を含む): 449205120

約数和(自身を除く): 237973340

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 133691, 267382, 534764, 668455, 1336910, 2673820, 10561589, 21123178, 42246356, 52807945, 105615890, 211231780]

約数ペア:

[(1, 211231780), (2, 105615890), (4, 52807945), (5, 42246356), (10, 21123178), (20, 10561589), (79, 2673820), (158, 1336910), (316, 668455), (395, 534764), (790, 267382), (1580, 133691)]