21197960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75707}}^1$

素因数の和:75725

約数の個数: 32

約数和(自身を含む): 54509760

約数和(自身を除く): 33311800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75707, 151414, 302828, 378535, 529949, 605656, 757070, 1059898, 1514140, 2119796, 2649745, 3028280, 4239592, 5299490, 10598980, 21197960]

約数ペア:

[(1, 21197960), (2, 10598980), (4, 5299490), (5, 4239592), (7, 3028280), (8, 2649745), (10, 2119796), (14, 1514140), (20, 1059898), (28, 757070), (35, 605656), (40, 529949), (56, 378535), (70, 302828), (140, 151414), (280, 75707)]