20903896

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{239}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 43898400

約数和(自身を除く): 22994504

約数列:

[1, 2, 4, 8, 13, 26, 29, 52, 58, 104, 116, 232, 239, 377, 478, 754, 841, 956, 1508, 1682, 1912, 3016, 3107, 3364, 6214, 6728, 6931, 10933, 12428, 13862, 21866, 24856, 27724, 43732, 55448, 87464, 90103, 180206, 200999, 360412, 401998, 720824, 803996, 1607992, 2612987, 5225974, 10451948, 20903896]

約数ペア:

[(1, 20903896), (2, 10451948), (4, 5225974), (8, 2612987), (13, 1607992), (26, 803996), (29, 720824), (52, 401998), (58, 360412), (104, 200999), (116, 180206), (232, 90103), (239, 87464), (377, 55448), (478, 43732), (754, 27724), (841, 24856), (956, 21866), (1508, 13862), (1682, 12428), (1912, 10933), (3016, 6931), (3107, 6728), (3364, 6214)]