21371000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:142

約数の個数: 128

約数和(自身を含む): 59304960

約数和(自身を除く): 37933960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 43, 50, 56, 70, 71, 86, 100, 125, 140, 142, 172, 175, 200, 215, 250, 280, 284, 301, 344, 350, 355, 430, 497, 500, 568, 602, 700, 710, 860, 875, 994, 1000, 1075, 1204, 1400, 1420, 1505, 1720, 1750, 1775, 1988, 2150, 2408, 2485, 2840, 3010, 3053, 3500, 3550, 3976, 4300, 4970, 5375, 6020, 6106, 7000, 7100, 7525, 8600, 8875, 9940, 10750, 12040, 12212, 12425, 14200, 15050, 15265, 17750, 19880, 21371, 21500, 24424, 24850, 30100, 30530, 35500, 37625, 42742, 43000, 49700, 60200, 61060, 62125, 71000, 75250, 76325, 85484, 99400, 106855, 122120, 124250, 150500, 152650, 170968, 213710, 248500, 301000, 305300, 381625, 427420, 497000, 534275, 610600, 763250, 854840, 1068550, 1526500, 2137100, 2671375, 3053000, 4274200, 5342750, 10685500, 21371000]

約数ペア:

[(1, 21371000), (2, 10685500), (4, 5342750), (5, 4274200), (7, 3053000), (8, 2671375), (10, 2137100), (14, 1526500), (20, 1068550), (25, 854840), (28, 763250), (35, 610600), (40, 534275), (43, 497000), (50, 427420), (56, 381625), (70, 305300), (71, 301000), (86, 248500), (100, 213710), (125, 170968), (140, 152650), (142, 150500), (172, 124250), (175, 122120), (200, 106855), (215, 99400), (250, 85484), (280, 76325), (284, 75250), (301, 71000), (344, 62125), (350, 61060), (355, 60200), (430, 49700), (497, 43000), (500, 42742), (568, 37625), (602, 35500), (700, 30530), (710, 30100), (860, 24850), (875, 24424), (994, 21500), (1000, 21371), (1075, 19880), (1204, 17750), (1400, 15265), (1420, 15050), (1505, 14200), (1720, 12425), (1750, 12212), (1775, 12040), (1988, 10750), (2150, 9940), (2408, 8875), (2485, 8600), (2840, 7525), (3010, 7100), (3053, 7000), (3500, 6106), (3550, 6020), (3976, 5375), (4300, 4970)]