639888900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{304709}}^1$

素因数の和:304733

約数の個数: 72

約数和(自身を含む): 2115906240

約数和(自身を除く): 1476017340

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 100, 105, 140, 150, 175, 210, 300, 350, 420, 525, 700, 1050, 2100, 304709, 609418, 914127, 1218836, 1523545, 1828254, 2132963, 3047090, 3656508, 4265926, 4570635, 6094180, 6398889, 7617725, 8531852, 9141270, 10664815, 12797778, 15235450, 18282540, 21329630, 22853175, 25595556, 30470900, 31994445, 42659260, 45706350, 53324075, 63988890, 91412700, 106648150, 127977780, 159972225, 213296300, 319944450, 639888900]

約数ペア:

[(1, 639888900), (2, 319944450), (3, 213296300), (4, 159972225), (5, 127977780), (6, 106648150), (7, 91412700), (10, 63988890), (12, 53324075), (14, 45706350), (15, 42659260), (20, 31994445), (21, 30470900), (25, 25595556), (28, 22853175), (30, 21329630), (35, 18282540), (42, 15235450), (50, 12797778), (60, 10664815), (70, 9141270), (75, 8531852), (84, 7617725), (100, 6398889), (105, 6094180), (140, 4570635), (150, 4265926), (175, 3656508), (210, 3047090), (300, 2132963), (350, 1828254), (420, 1523545), (525, 1218836), (700, 914127), (1050, 609418), (2100, 304709)]