19768820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{181}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 43051008

約数和(自身を除く): 23282188

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 127, 172, 181, 215, 254, 362, 430, 508, 635, 724, 860, 905, 1270, 1810, 2540, 3620, 5461, 7783, 10922, 15566, 21844, 22987, 27305, 31132, 38915, 45974, 54610, 77830, 91948, 109220, 114935, 155660, 229870, 459740, 988441, 1976882, 3953764, 4942205, 9884410, 19768820]

約数ペア:

[(1, 19768820), (2, 9884410), (4, 4942205), (5, 3953764), (10, 1976882), (20, 988441), (43, 459740), (86, 229870), (127, 155660), (172, 114935), (181, 109220), (215, 91948), (254, 77830), (362, 54610), (430, 45974), (508, 38915), (635, 31132), (724, 27305), (860, 22987), (905, 21844), (1270, 15566), (1810, 10922), (2540, 7783), (3620, 5461)]