19957905

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1753}}^1$

素因数の和:1798

約数の個数: 48

約数和(自身を含む): 39401856

約数和(自身を除く): 19443951

約数列:

[1, 3, 5, 9, 11, 15, 23, 33, 45, 55, 69, 99, 115, 165, 207, 253, 345, 495, 759, 1035, 1265, 1753, 2277, 3795, 5259, 8765, 11385, 15777, 19283, 26295, 40319, 57849, 78885, 96415, 120957, 173547, 201595, 289245, 362871, 443509, 604785, 867735, 1330527, 1814355, 2217545, 3991581, 6652635, 19957905]

約数ペア:

[(1, 19957905), (3, 6652635), (5, 3991581), (9, 2217545), (11, 1814355), (15, 1330527), (23, 867735), (33, 604785), (45, 443509), (55, 362871), (69, 289245), (99, 201595), (115, 173547), (165, 120957), (207, 96415), (253, 78885), (345, 57849), (495, 40319), (759, 26295), (1035, 19283), (1265, 15777), (1753, 11385), (2277, 8765), (3795, 5259)]