21371995

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{487}}^1$

素因数の和:690

約数の個数: 16

約数和(自身を含む): 26281728

約数和(自身を除く): 4909733

約数列:

[1, 5, 67, 131, 335, 487, 655, 2435, 8777, 32629, 43885, 63797, 163145, 318985, 4274399, 21371995]

約数ペア:

[(1, 21371995), (5, 4274399), (67, 318985), (131, 163145), (335, 63797), (487, 43885), (655, 32629), (2435, 8777)]