20815690

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1847}}^1$

素因数の和:1891

約数の個数: 48

約数和(自身を含む): 45505152

約数和(自身を除く): 24689462

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 49, 70, 98, 115, 161, 230, 245, 322, 490, 805, 1127, 1610, 1847, 2254, 3694, 5635, 9235, 11270, 12929, 18470, 25858, 42481, 64645, 84962, 90503, 129290, 181006, 212405, 297367, 424810, 452515, 594734, 905030, 1486835, 2081569, 2973670, 4163138, 10407845, 20815690]

約数ペア:

[(1, 20815690), (2, 10407845), (5, 4163138), (7, 2973670), (10, 2081569), (14, 1486835), (23, 905030), (35, 594734), (46, 452515), (49, 424810), (70, 297367), (98, 212405), (115, 181006), (161, 129290), (230, 90503), (245, 84962), (322, 64645), (490, 42481), (805, 25858), (1127, 18470), (1610, 12929), (1847, 11270), (2254, 9235), (3694, 5635)]