1561000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{223}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 4193280

約数和(自身を除く): 2632280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 223, 250, 280, 350, 446, 500, 700, 875, 892, 1000, 1115, 1400, 1561, 1750, 1784, 2230, 3122, 3500, 4460, 5575, 6244, 7000, 7805, 8920, 11150, 12488, 15610, 22300, 27875, 31220, 39025, 44600, 55750, 62440, 78050, 111500, 156100, 195125, 223000, 312200, 390250, 780500, 1561000]

約数ペア:

[(1, 1561000), (2, 780500), (4, 390250), (5, 312200), (7, 223000), (8, 195125), (10, 156100), (14, 111500), (20, 78050), (25, 62440), (28, 55750), (35, 44600), (40, 39025), (50, 31220), (56, 27875), (70, 22300), (100, 15610), (125, 12488), (140, 11150), (175, 8920), (200, 7805), (223, 7000), (250, 6244), (280, 5575), (350, 4460), (446, 3500), (500, 3122), (700, 2230), (875, 1784), (892, 1750), (1000, 1561), (1115, 1400)]