18900917

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{541}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 23726592

約数和(自身を除く): 4825675

約数列:

[1, 7, 23, 31, 49, 161, 217, 541, 713, 1127, 1519, 3787, 4991, 12443, 16771, 26509, 34937, 87101, 117397, 385733, 609707, 821779, 2700131, 18900917]

約数ペア:

[(1, 18900917), (7, 2700131), (23, 821779), (31, 609707), (49, 385733), (161, 117397), (217, 87101), (541, 34937), (713, 26509), (1127, 16771), (1519, 12443), (3787, 4991)]