81380236

素因数分解:

$2^2\times 7^1\times {\mathrm{397}}^1\times {\mathrm{7321}}^1$

素因数の和:7729

約数の個数: 24

約数和(自身を含む): 163192736

約数和(自身を除く): 81812500

約数列:

[1, 2, 4, 7, 14, 28, 397, 794, 1588, 2779, 5558, 7321, 11116, 14642, 29284, 51247, 102494, 204988, 2906437, 5812874, 11625748, 20345059, 40690118, 81380236]

約数ペア:

[(1, 81380236), (2, 40690118), (4, 20345059), (7, 11625748), (14, 5812874), (28, 2906437), (397, 204988), (794, 102494), (1588, 51247), (2779, 29284), (5558, 14642), (7321, 11116)]