18840848

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{379}}^1$

素因数の和:639

約数の個数: 40

約数和(自身を含む): 39580800

約数和(自身を除く): 20739952

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 239, 379, 478, 758, 956, 1516, 1912, 3032, 3107, 3824, 4927, 6064, 6214, 9854, 12428, 19708, 24856, 39416, 49712, 78832, 90581, 181162, 362324, 724648, 1177553, 1449296, 2355106, 4710212, 9420424, 18840848]

約数ペア:

[(1, 18840848), (2, 9420424), (4, 4710212), (8, 2355106), (13, 1449296), (16, 1177553), (26, 724648), (52, 362324), (104, 181162), (208, 90581), (239, 78832), (379, 49712), (478, 39416), (758, 24856), (956, 19708), (1516, 12428), (1912, 9854), (3032, 6214), (3107, 6064), (3824, 4927)]