20580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^3$

素因数の和:33

約数の個数: 48

約数和(自身を含む): 67200

約数和(自身を除く): 46620

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 343, 420, 490, 588, 686, 735, 980, 1029, 1372, 1470, 1715, 2058, 2940, 3430, 4116, 5145, 6860, 10290, 20580]

約数ペア:

[(1, 20580), (2, 10290), (3, 6860), (4, 5145), (5, 4116), (6, 3430), (7, 2940), (10, 2058), (12, 1715), (14, 1470), (15, 1372), (20, 1029), (21, 980), (28, 735), (30, 686), (35, 588), (42, 490), (49, 420), (60, 343), (70, 294), (84, 245), (98, 210), (105, 196), (140, 147)]