20978600

素因数分解:

$2^3\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3617}}^1$

素因数の和:3662

約数の個数: 48

約数和(自身を含む): 50471100

約数和(自身を除く): 29492500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 29, 40, 50, 58, 100, 116, 145, 200, 232, 290, 580, 725, 1160, 1450, 2900, 3617, 5800, 7234, 14468, 18085, 28936, 36170, 72340, 90425, 104893, 144680, 180850, 209786, 361700, 419572, 524465, 723400, 839144, 1048930, 2097860, 2622325, 4195720, 5244650, 10489300, 20978600]

約数ペア:

[(1, 20978600), (2, 10489300), (4, 5244650), (5, 4195720), (8, 2622325), (10, 2097860), (20, 1048930), (25, 839144), (29, 723400), (40, 524465), (50, 419572), (58, 361700), (100, 209786), (116, 180850), (145, 144680), (200, 104893), (232, 90425), (290, 72340), (580, 36170), (725, 28936), (1160, 18085), (1450, 14468), (2900, 7234), (3617, 5800)]