197721880

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{12451}}^1$

素因数の和:12859

約数の個数: 32

約数和(自身を含む): 446030640

約数和(自身を除く): 248308760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 12451, 15880, 24902, 49804, 62255, 99608, 124510, 249020, 498040, 4943047, 9886094, 19772188, 24715235, 39544376, 49430470, 98860940, 197721880]

約数ペア:

[(1, 197721880), (2, 98860940), (4, 49430470), (5, 39544376), (8, 24715235), (10, 19772188), (20, 9886094), (40, 4943047), (397, 498040), (794, 249020), (1588, 124510), (1985, 99608), (3176, 62255), (3970, 49804), (7940, 24902), (12451, 15880)]