213789020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{344821}}^1$

素因数の和:344861

約数の個数: 24

約数和(自身を含む): 463440768

約数和(自身を除く): 249651748

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 344821, 689642, 1379284, 1724105, 3448210, 6896420, 10689451, 21378902, 42757804, 53447255, 106894510, 213789020]

約数ペア:

[(1, 213789020), (2, 106894510), (4, 53447255), (5, 42757804), (10, 21378902), (20, 10689451), (31, 6896420), (62, 3448210), (124, 1724105), (155, 1379284), (310, 689642), (620, 344821)]