2780000

素因数分解:

$2^5\times 5^4\times {\mathrm{139}}^1$

素因数の和:169

約数の個数: 60

約数和(自身を含む): 6888420

約数和(自身を除く): 4108420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 139, 160, 200, 250, 278, 400, 500, 556, 625, 695, 800, 1000, 1112, 1250, 1390, 2000, 2224, 2500, 2780, 3475, 4000, 4448, 5000, 5560, 6950, 10000, 11120, 13900, 17375, 20000, 22240, 27800, 34750, 55600, 69500, 86875, 111200, 139000, 173750, 278000, 347500, 556000, 695000, 1390000, 2780000]

約数ペア:

[(1, 2780000), (2, 1390000), (4, 695000), (5, 556000), (8, 347500), (10, 278000), (16, 173750), (20, 139000), (25, 111200), (32, 86875), (40, 69500), (50, 55600), (80, 34750), (100, 27800), (125, 22240), (139, 20000), (160, 17375), (200, 13900), (250, 11120), (278, 10000), (400, 6950), (500, 5560), (556, 5000), (625, 4448), (695, 4000), (800, 3475), (1000, 2780), (1112, 2500), (1250, 2224), (1390, 2000)]