19689915

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 64

約数和(自身を含む): 38016000

約数和(自身を除く): 18326085

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 49, 89, 105, 129, 147, 215, 245, 267, 301, 343, 445, 623, 645, 735, 903, 1029, 1335, 1505, 1715, 1869, 2107, 3115, 3827, 4361, 4515, 5145, 6321, 9345, 10535, 11481, 13083, 14749, 19135, 21805, 26789, 30527, 31605, 44247, 57405, 65415, 73745, 80367, 91581, 133945, 152635, 187523, 221235, 401835, 457905, 562569, 937615, 1312661, 2812845, 3937983, 6563305, 19689915]

約数ペア:

[(1, 19689915), (3, 6563305), (5, 3937983), (7, 2812845), (15, 1312661), (21, 937615), (35, 562569), (43, 457905), (49, 401835), (89, 221235), (105, 187523), (129, 152635), (147, 133945), (215, 91581), (245, 80367), (267, 73745), (301, 65415), (343, 57405), (445, 44247), (623, 31605), (645, 30527), (735, 26789), (903, 21805), (1029, 19135), (1335, 14749), (1505, 13083), (1715, 11481), (1869, 10535), (2107, 9345), (3115, 6321), (3827, 5145), (4361, 4515)]