3970000

素因数分解:

$2^4\times 5^4\times {\mathrm{397}}^1$

素因数の和:425

約数の個数: 50

約数和(自身を含む): 9635978

約数和(自身を除く): 5665978

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 397, 400, 500, 625, 794, 1000, 1250, 1588, 1985, 2000, 2500, 3176, 3970, 5000, 6352, 7940, 9925, 10000, 15880, 19850, 31760, 39700, 49625, 79400, 99250, 158800, 198500, 248125, 397000, 496250, 794000, 992500, 1985000, 3970000]

約数ペア:

[(1, 3970000), (2, 1985000), (4, 992500), (5, 794000), (8, 496250), (10, 397000), (16, 248125), (20, 198500), (25, 158800), (40, 99250), (50, 79400), (80, 49625), (100, 39700), (125, 31760), (200, 19850), (250, 15880), (397, 10000), (400, 9925), (500, 7940), (625, 6352), (794, 5000), (1000, 3970), (1250, 3176), (1588, 2500), (1985, 2000)]