21861920

素因数分解:

$2^5\times 5^1\times {\mathrm{139}}^1\times {\mathrm{983}}^1$

素因数の和:1137

約数の個数: 48

約数和(自身を含む): 52073280

約数和(自身を除く): 30211360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 139, 160, 278, 556, 695, 983, 1112, 1390, 1966, 2224, 2780, 3932, 4448, 4915, 5560, 7864, 9830, 11120, 15728, 19660, 22240, 31456, 39320, 78640, 136637, 157280, 273274, 546548, 683185, 1093096, 1366370, 2186192, 2732740, 4372384, 5465480, 10930960, 21861920]

約数ペア:

[(1, 21861920), (2, 10930960), (4, 5465480), (5, 4372384), (8, 2732740), (10, 2186192), (16, 1366370), (20, 1093096), (32, 683185), (40, 546548), (80, 273274), (139, 157280), (160, 136637), (278, 78640), (556, 39320), (695, 31456), (983, 22240), (1112, 19660), (1390, 15728), (1966, 11120), (2224, 9830), (2780, 7864), (3932, 5560), (4448, 4915)]