7850000

素因数分解:

$2^4\times 5^5\times {\mathrm{157}}^1$

素因数の和:190

約数の個数: 60

約数和(自身を含む): 19131588

約数和(自身を除く): 11281588

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 157, 200, 250, 314, 400, 500, 625, 628, 785, 1000, 1250, 1256, 1570, 2000, 2500, 2512, 3125, 3140, 3925, 5000, 6250, 6280, 7850, 10000, 12500, 12560, 15700, 19625, 25000, 31400, 39250, 50000, 62800, 78500, 98125, 157000, 196250, 314000, 392500, 490625, 785000, 981250, 1570000, 1962500, 3925000, 7850000]

約数ペア:

[(1, 7850000), (2, 3925000), (4, 1962500), (5, 1570000), (8, 981250), (10, 785000), (16, 490625), (20, 392500), (25, 314000), (40, 196250), (50, 157000), (80, 98125), (100, 78500), (125, 62800), (157, 50000), (200, 39250), (250, 31400), (314, 25000), (400, 19625), (500, 15700), (625, 12560), (628, 12500), (785, 10000), (1000, 7850), (1250, 6280), (1256, 6250), (1570, 5000), (2000, 3925), (2500, 3140), (2512, 3125)]