19978192

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{691}}^1$

素因数の和:851

約数の個数: 40

約数和(自身を含む): 42045920

約数和(自身を除く): 22067728

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 139, 208, 278, 556, 691, 1112, 1382, 1807, 2224, 2764, 3614, 5528, 7228, 8983, 11056, 14456, 17966, 28912, 35932, 71864, 96049, 143728, 192098, 384196, 768392, 1248637, 1536784, 2497274, 4994548, 9989096, 19978192]

約数ペア:

[(1, 19978192), (2, 9989096), (4, 4994548), (8, 2497274), (13, 1536784), (16, 1248637), (26, 768392), (52, 384196), (104, 192098), (139, 143728), (208, 96049), (278, 71864), (556, 35932), (691, 28912), (1112, 17966), (1382, 14456), (1807, 11056), (2224, 8983), (2764, 7228), (3614, 5528)]