20866860

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16561}}^1$

素因数の和:16583

約数の個数: 72

約数和(自身を含む): 72342816

約数和(自身を除く): 51475956

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16561, 33122, 49683, 66244, 82805, 99366, 115927, 149049, 165610, 198732, 231854, 248415, 298098, 331220, 347781, 463708, 496830, 579635, 596196, 695562, 745245, 993660, 1043343, 1159270, 1391124, 1490490, 1738905, 2086686, 2318540, 2980980, 3477810, 4173372, 5216715, 6955620, 10433430, 20866860]

約数ペア:

[(1, 20866860), (2, 10433430), (3, 6955620), (4, 5216715), (5, 4173372), (6, 3477810), (7, 2980980), (9, 2318540), (10, 2086686), (12, 1738905), (14, 1490490), (15, 1391124), (18, 1159270), (20, 1043343), (21, 993660), (28, 745245), (30, 695562), (35, 596196), (36, 579635), (42, 496830), (45, 463708), (60, 347781), (63, 331220), (70, 298098), (84, 248415), (90, 231854), (105, 198732), (126, 165610), (140, 149049), (180, 115927), (210, 99366), (252, 82805), (315, 66244), (420, 49683), (630, 33122), (1260, 16561)]