21780230

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{128119}}^1$

素因数の和:128143

約数の個数: 16

約数和(自身を含む): 41510880

約数和(自身を除く): 19730650

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 128119, 256238, 640595, 1281190, 2178023, 4356046, 10890115, 21780230]

約数ペア:

[(1, 21780230), (2, 10890115), (5, 4356046), (10, 2178023), (17, 1281190), (34, 640595), (85, 256238), (170, 128119)]