21178636

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{67021}}^1$

素因数の和:67104

約数の個数: 12

約数和(自身を含む): 37532320

約数和(自身を除く): 16353684

約数列:

[1, 2, 4, 79, 158, 316, 67021, 134042, 268084, 5294659, 10589318, 21178636]

約数ペア:

[(1, 21178636), (2, 10589318), (4, 5294659), (79, 268084), (158, 134042), (316, 67021)]