20860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1$

素因数の和:165

約数の個数: 24

約数和(自身を含む): 50400

約数和(自身を除く): 29540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 1043, 1490, 2086, 2980, 4172, 5215, 10430, 20860]

約数ペア:

[(1, 20860), (2, 10430), (4, 5215), (5, 4172), (7, 2980), (10, 2086), (14, 1490), (20, 1043), (28, 745), (35, 596), (70, 298), (140, 149)]