19876815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{709}}^1$

素因数の和:816

約数の個数: 48

約数和(自身を含む): 39873600

約数和(自身を除く): 19996785

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 89, 105, 267, 315, 445, 623, 709, 801, 1335, 1869, 2127, 3115, 3545, 4005, 4963, 5607, 6381, 9345, 10635, 14889, 24815, 28035, 31905, 44667, 63101, 74445, 189303, 223335, 315505, 441707, 567909, 946515, 1325121, 2208535, 2839545, 3975363, 6625605, 19876815]

約数ペア:

[(1, 19876815), (3, 6625605), (5, 3975363), (7, 2839545), (9, 2208535), (15, 1325121), (21, 946515), (35, 567909), (45, 441707), (63, 315505), (89, 223335), (105, 189303), (267, 74445), (315, 63101), (445, 44667), (623, 31905), (709, 28035), (801, 24815), (1335, 14889), (1869, 10635), (2127, 9345), (3115, 6381), (3545, 5607), (4005, 4963)]