21898090

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{70639}}^1$

素因数の和:70677

約数の個数: 16

約数和(自身を含む): 40688640

約数和(自身を除く): 18790550

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 70639, 141278, 353195, 706390, 2189809, 4379618, 10949045, 21898090]

約数ペア:

[(1, 21898090), (2, 10949045), (5, 4379618), (10, 2189809), (31, 706390), (62, 353195), (155, 141278), (310, 70639)]