7900000

素因数分解:

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

素因数の和:114

約数の個数: 72

約数和(自身を含む): 19686240

約数和(自身を除く): 11786240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 125, 158, 160, 200, 250, 316, 395, 400, 500, 625, 632, 790, 800, 1000, 1250, 1264, 1580, 1975, 2000, 2500, 2528, 3125, 3160, 3950, 4000, 5000, 6250, 6320, 7900, 9875, 10000, 12500, 12640, 15800, 19750, 20000, 25000, 31600, 39500, 49375, 50000, 63200, 79000, 98750, 100000, 158000, 197500, 246875, 316000, 395000, 493750, 790000, 987500, 1580000, 1975000, 3950000, 7900000]

約数ペア:

[(1, 7900000), (2, 3950000), (4, 1975000), (5, 1580000), (8, 987500), (10, 790000), (16, 493750), (20, 395000), (25, 316000), (32, 246875), (40, 197500), (50, 158000), (79, 100000), (80, 98750), (100, 79000), (125, 63200), (158, 50000), (160, 49375), (200, 39500), (250, 31600), (316, 25000), (395, 20000), (400, 19750), (500, 15800), (625, 12640), (632, 12500), (790, 10000), (800, 9875), (1000, 7900), (1250, 6320), (1264, 6250), (1580, 5000), (1975, 4000), (2000, 3950), (2500, 3160), (2528, 3125)]