21087180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{193}}^1\times {\mathrm{607}}^1$

素因数の和:815

約数の個数: 72

約数和(自身を含む): 64401792

約数和(自身を除く): 43314612

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 193, 386, 579, 607, 772, 965, 1158, 1214, 1737, 1821, 1930, 2316, 2428, 2895, 3035, 3474, 3642, 3860, 5463, 5790, 6070, 6948, 7284, 8685, 9105, 10926, 11580, 12140, 17370, 18210, 21852, 27315, 34740, 36420, 54630, 109260, 117151, 234302, 351453, 468604, 585755, 702906, 1054359, 1171510, 1405812, 1757265, 2108718, 2343020, 3514530, 4217436, 5271795, 7029060, 10543590, 21087180]

約数ペア:

[(1, 21087180), (2, 10543590), (3, 7029060), (4, 5271795), (5, 4217436), (6, 3514530), (9, 2343020), (10, 2108718), (12, 1757265), (15, 1405812), (18, 1171510), (20, 1054359), (30, 702906), (36, 585755), (45, 468604), (60, 351453), (90, 234302), (180, 117151), (193, 109260), (386, 54630), (579, 36420), (607, 34740), (772, 27315), (965, 21852), (1158, 18210), (1214, 17370), (1737, 12140), (1821, 11580), (1930, 10926), (2316, 9105), (2428, 8685), (2895, 7284), (3035, 6948), (3474, 6070), (3642, 5790), (3860, 5463)]