20454928

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2287}}^1$

素因数の和:2351

約数の個数: 40

約数和(自身を含む): 43691648

約数和(自身を除く): 23236720

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2287, 4472, 4574, 8944, 9148, 18296, 29731, 36592, 59462, 98341, 118924, 196682, 237848, 393364, 475696, 786728, 1278433, 1573456, 2556866, 5113732, 10227464, 20454928]

約数ペア:

[(1, 20454928), (2, 10227464), (4, 5113732), (8, 2556866), (13, 1573456), (16, 1278433), (26, 786728), (43, 475696), (52, 393364), (86, 237848), (104, 196682), (172, 118924), (208, 98341), (344, 59462), (559, 36592), (688, 29731), (1118, 18296), (2236, 9148), (2287, 8944), (4472, 4574)]