20538160

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1723}}^1$

素因数の和:1885

約数の個数: 40

約数和(自身を含む): 48099600

約数和(自身を除く): 27561440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1723, 2384, 2980, 3446, 5960, 6892, 8615, 11920, 13784, 17230, 27568, 34460, 68920, 137840, 256727, 513454, 1026908, 1283635, 2053816, 2567270, 4107632, 5134540, 10269080, 20538160]

約数ペア:

[(1, 20538160), (2, 10269080), (4, 5134540), (5, 4107632), (8, 2567270), (10, 2053816), (16, 1283635), (20, 1026908), (40, 513454), (80, 256727), (149, 137840), (298, 68920), (596, 34460), (745, 27568), (1192, 17230), (1490, 13784), (1723, 11920), (2384, 8615), (2980, 6892), (3446, 5960)]