21989005

素因数分解:

$5^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1\times {\mathrm{569}}^1$

素因数の和:764

約数の個数: 16

約数和(自身を含む): 27086400

約数和(自身を除く): 5097395

約数列:

[1, 5, 59, 131, 295, 569, 655, 2845, 7729, 33571, 38645, 74539, 167855, 372695, 4397801, 21989005]

約数ペア:

[(1, 21989005), (5, 4397801), (59, 372695), (131, 167855), (295, 74539), (569, 38645), (655, 33571), (2845, 7729)]