20917960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74707}}^1$

素因数の和:74725

約数の個数: 32

約数和(自身を含む): 53789760

約数和(自身を除く): 32871800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74707, 149414, 298828, 373535, 522949, 597656, 747070, 1045898, 1494140, 2091796, 2614745, 2988280, 4183592, 5229490, 10458980, 20917960]

約数ペア:

[(1, 20917960), (2, 10458980), (4, 5229490), (5, 4183592), (7, 2988280), (8, 2614745), (10, 2091796), (14, 1494140), (20, 1045898), (28, 747070), (35, 597656), (40, 522949), (56, 373535), (70, 298828), (140, 149414), (280, 74707)]