21758520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25903}}^1$

素因数の和:25924

約数の個数: 64

約数和(自身を含む): 74603520

約数和(自身を除く): 52845000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25903, 51806, 77709, 103612, 129515, 155418, 181321, 207224, 259030, 310836, 362642, 388545, 518060, 543963, 621672, 725284, 777090, 906605, 1036120, 1087926, 1450568, 1554180, 1813210, 2175852, 2719815, 3108360, 3626420, 4351704, 5439630, 7252840, 10879260, 21758520]

約数ペア:

[(1, 21758520), (2, 10879260), (3, 7252840), (4, 5439630), (5, 4351704), (6, 3626420), (7, 3108360), (8, 2719815), (10, 2175852), (12, 1813210), (14, 1554180), (15, 1450568), (20, 1087926), (21, 1036120), (24, 906605), (28, 777090), (30, 725284), (35, 621672), (40, 543963), (42, 518060), (56, 388545), (60, 362642), (70, 310836), (84, 259030), (105, 207224), (120, 181321), (140, 155418), (168, 129515), (210, 103612), (280, 77709), (420, 51806), (840, 25903)]