181996820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{409}}^1\times {\mathrm{1171}}^1$

素因数の和:1608

約数の個数: 48

約数和(自身を含む): 403636800

約数和(自身を除く): 221639980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 409, 818, 1171, 1636, 2045, 2342, 4090, 4684, 5855, 7771, 8180, 11710, 15542, 22249, 23420, 31084, 38855, 44498, 77710, 88996, 111245, 155420, 222490, 444980, 478939, 957878, 1915756, 2394695, 4789390, 9099841, 9578780, 18199682, 36399364, 45499205, 90998410, 181996820]

約数ペア:

[(1, 181996820), (2, 90998410), (4, 45499205), (5, 36399364), (10, 18199682), (19, 9578780), (20, 9099841), (38, 4789390), (76, 2394695), (95, 1915756), (190, 957878), (380, 478939), (409, 444980), (818, 222490), (1171, 155420), (1636, 111245), (2045, 88996), (2342, 77710), (4090, 44498), (4684, 38855), (5855, 31084), (7771, 23420), (8180, 22249), (11710, 15542)]