21420238

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{90001}}^1$

素因数の和:90027

約数の個数: 16

約数和(自身を含む): 38880864

約数和(自身を除く): 17460626

約数列:

[1, 2, 7, 14, 17, 34, 119, 238, 90001, 180002, 630007, 1260014, 1530017, 3060034, 10710119, 21420238]

約数ペア:

[(1, 21420238), (2, 10710119), (7, 3060034), (14, 1530017), (17, 1260014), (34, 630007), (119, 180002), (238, 90001)]