20866880

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1069}}^1$

素因数の和:1147

約数の個数: 56

約数和(自身を含む): 50551080

約数和(自身を除く): 29684200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1069, 1220, 1952, 2138, 2440, 3904, 4276, 4880, 5345, 8552, 9760, 10690, 17104, 19520, 21380, 34208, 42760, 65209, 68416, 85520, 130418, 171040, 260836, 326045, 342080, 521672, 652090, 1043344, 1304180, 2086688, 2608360, 4173376, 5216720, 10433440, 20866880]

約数ペア:

[(1, 20866880), (2, 10433440), (4, 5216720), (5, 4173376), (8, 2608360), (10, 2086688), (16, 1304180), (20, 1043344), (32, 652090), (40, 521672), (61, 342080), (64, 326045), (80, 260836), (122, 171040), (160, 130418), (244, 85520), (305, 68416), (320, 65209), (488, 42760), (610, 34208), (976, 21380), (1069, 19520), (1220, 17104), (1952, 10690), (2138, 9760), (2440, 8552), (3904, 5345), (4276, 4880)]