7940000

素因数分解:

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

素因数の和:427

約数の個数: 60

約数和(自身を含む): 19582794

約数和(自身を除く): 11642794

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 397, 400, 500, 625, 794, 800, 1000, 1250, 1588, 1985, 2000, 2500, 3176, 3970, 4000, 5000, 6352, 7940, 9925, 10000, 12704, 15880, 19850, 20000, 31760, 39700, 49625, 63520, 79400, 99250, 158800, 198500, 248125, 317600, 397000, 496250, 794000, 992500, 1588000, 1985000, 3970000, 7940000]

約数ペア:

[(1, 7940000), (2, 3970000), (4, 1985000), (5, 1588000), (8, 992500), (10, 794000), (16, 496250), (20, 397000), (25, 317600), (32, 248125), (40, 198500), (50, 158800), (80, 99250), (100, 79400), (125, 63520), (160, 49625), (200, 39700), (250, 31760), (397, 20000), (400, 19850), (500, 15880), (625, 12704), (794, 10000), (800, 9925), (1000, 7940), (1250, 6352), (1588, 5000), (1985, 4000), (2000, 3970), (2500, 3176)]