3950000

素因数分解:

$2^4\times 5^5\times {\mathrm{79}}^1$

素因数の和:112

約数の個数: 60

約数和(自身を含む): 9686880

約数和(自身を除く): 5736880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 79, 80, 100, 125, 158, 200, 250, 316, 395, 400, 500, 625, 632, 790, 1000, 1250, 1264, 1580, 1975, 2000, 2500, 3125, 3160, 3950, 5000, 6250, 6320, 7900, 9875, 10000, 12500, 15800, 19750, 25000, 31600, 39500, 49375, 50000, 79000, 98750, 158000, 197500, 246875, 395000, 493750, 790000, 987500, 1975000, 3950000]

約数ペア:

[(1, 3950000), (2, 1975000), (4, 987500), (5, 790000), (8, 493750), (10, 395000), (16, 246875), (20, 197500), (25, 158000), (40, 98750), (50, 79000), (79, 50000), (80, 49375), (100, 39500), (125, 31600), (158, 25000), (200, 19750), (250, 15800), (316, 12500), (395, 10000), (400, 9875), (500, 7900), (625, 6320), (632, 6250), (790, 5000), (1000, 3950), (1250, 3160), (1264, 3125), (1580, 2500), (1975, 2000)]