21406864

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{43159}}^1$

素因数の和:43198

約数の個数: 20

約数和(自身を含む): 42814720

約数和(自身を除く): 21407856

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 43159, 86318, 172636, 345272, 690544, 1337929, 2675858, 5351716, 10703432, 21406864]

約数ペア:

[(1, 21406864), (2, 10703432), (4, 5351716), (8, 2675858), (16, 1337929), (31, 690544), (62, 345272), (124, 172636), (248, 86318), (496, 43159)]