19949985

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{983}}^1$

素因数の和:1046

約数の個数: 48

約数和(自身を含む): 38683008

約数和(自身を除く): 18733023

約数列:

[1, 3, 5, 9, 11, 15, 33, 41, 45, 55, 99, 123, 165, 205, 369, 451, 495, 615, 983, 1353, 1845, 2255, 2949, 4059, 4915, 6765, 8847, 10813, 14745, 20295, 32439, 40303, 44235, 54065, 97317, 120909, 162195, 201515, 362727, 443333, 486585, 604545, 1329999, 1813635, 2216665, 3989997, 6649995, 19949985]

約数ペア:

[(1, 19949985), (3, 6649995), (5, 3989997), (9, 2216665), (11, 1813635), (15, 1329999), (33, 604545), (41, 486585), (45, 443333), (55, 362727), (99, 201515), (123, 162195), (165, 120909), (205, 97317), (369, 54065), (451, 44235), (495, 40303), (615, 32439), (983, 20295), (1353, 14745), (1845, 10813), (2255, 8847), (2949, 6765), (4059, 4915)]