19869520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{337}}^1$

素因数の和:428

約数の個数: 80

約数和(自身を含む): 51300288

約数和(自身を除く): 31430768

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 67, 80, 88, 110, 134, 176, 220, 268, 335, 337, 440, 536, 670, 674, 737, 880, 1072, 1340, 1348, 1474, 1685, 2680, 2696, 2948, 3370, 3685, 3707, 5360, 5392, 5896, 6740, 7370, 7414, 11792, 13480, 14740, 14828, 18535, 22579, 26960, 29480, 29656, 37070, 45158, 58960, 59312, 74140, 90316, 112895, 148280, 180632, 225790, 248369, 296560, 361264, 451580, 496738, 903160, 993476, 1241845, 1806320, 1986952, 2483690, 3973904, 4967380, 9934760, 19869520]

約数ペア:

[(1, 19869520), (2, 9934760), (4, 4967380), (5, 3973904), (8, 2483690), (10, 1986952), (11, 1806320), (16, 1241845), (20, 993476), (22, 903160), (40, 496738), (44, 451580), (55, 361264), (67, 296560), (80, 248369), (88, 225790), (110, 180632), (134, 148280), (176, 112895), (220, 90316), (268, 74140), (335, 59312), (337, 58960), (440, 45158), (536, 37070), (670, 29656), (674, 29480), (737, 26960), (880, 22579), (1072, 18535), (1340, 14828), (1348, 14740), (1474, 13480), (1685, 11792), (2680, 7414), (2696, 7370), (2948, 6740), (3370, 5896), (3685, 5392), (3707, 5360)]