19890880

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1019}}^1$

素因数の和:1097

約数の個数: 56

約数和(自身を含む): 48188880

約数和(自身を除く): 28298000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1019, 1220, 1952, 2038, 2440, 3904, 4076, 4880, 5095, 8152, 9760, 10190, 16304, 19520, 20380, 32608, 40760, 62159, 65216, 81520, 124318, 163040, 248636, 310795, 326080, 497272, 621590, 994544, 1243180, 1989088, 2486360, 3978176, 4972720, 9945440, 19890880]

約数ペア:

[(1, 19890880), (2, 9945440), (4, 4972720), (5, 3978176), (8, 2486360), (10, 1989088), (16, 1243180), (20, 994544), (32, 621590), (40, 497272), (61, 326080), (64, 310795), (80, 248636), (122, 163040), (160, 124318), (244, 81520), (305, 65216), (320, 62159), (488, 40760), (610, 32608), (976, 20380), (1019, 19520), (1220, 16304), (1952, 10190), (2038, 9760), (2440, 8152), (3904, 5095), (4076, 4880)]