20891220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49741}}^1$

素因数の和:49760

約数の個数: 48

約数和(自身を含む): 66853248

約数和(自身を除く): 45962028

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49741, 99482, 149223, 198964, 248705, 298446, 348187, 497410, 596892, 696374, 746115, 994820, 1044561, 1392748, 1492230, 1740935, 2089122, 2984460, 3481870, 4178244, 5222805, 6963740, 10445610, 20891220]

約数ペア:

[(1, 20891220), (2, 10445610), (3, 6963740), (4, 5222805), (5, 4178244), (6, 3481870), (7, 2984460), (10, 2089122), (12, 1740935), (14, 1492230), (15, 1392748), (20, 1044561), (21, 994820), (28, 746115), (30, 696374), (35, 596892), (42, 497410), (60, 348187), (70, 298446), (84, 248705), (105, 198964), (140, 149223), (210, 99482), (420, 49741)]