19740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1$

素因数の和:66

約数の個数: 48

約数和(自身を含む): 64512

約数和(自身を除く): 44772

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 47, 60, 70, 84, 94, 105, 140, 141, 188, 210, 235, 282, 329, 420, 470, 564, 658, 705, 940, 987, 1316, 1410, 1645, 1974, 2820, 3290, 3948, 4935, 6580, 9870, 19740]

約数ペア:

[(1, 19740), (2, 9870), (3, 6580), (4, 4935), (5, 3948), (6, 3290), (7, 2820), (10, 1974), (12, 1645), (14, 1410), (15, 1316), (20, 987), (21, 940), (28, 705), (30, 658), (35, 564), (42, 470), (47, 420), (60, 329), (70, 282), (84, 235), (94, 210), (105, 188), (140, 141)]