1390000

素因数分解:

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

素因数の和:167

約数の個数: 50

約数和(自身を含む): 3389540

約数和(自身を除く): 1999540

約数列:

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

約数ペア:

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