21359930

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{68903}}^1$

素因数の和:68941

約数の個数: 16

約数和(自身を含む): 39688704

約数和(自身を除く): 18328774

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 68903, 137806, 344515, 689030, 2135993, 4271986, 10679965, 21359930]

約数ペア:

[(1, 21359930), (2, 10679965), (5, 4271986), (10, 2135993), (31, 689030), (62, 344515), (155, 137806), (310, 68903)]