21918760

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{829}}^1$

素因数の和:1501

約数の個数: 32

約数和(自身を含む): 49451400

約数和(自身を除く): 27532640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 829, 1322, 1658, 2644, 3305, 3316, 4145, 5288, 6610, 6632, 8290, 13220, 16580, 26440, 33160, 547969, 1095938, 2191876, 2739845, 4383752, 5479690, 10959380, 21918760]

約数ペア:

[(1, 21918760), (2, 10959380), (4, 5479690), (5, 4383752), (8, 2739845), (10, 2191876), (20, 1095938), (40, 547969), (661, 33160), (829, 26440), (1322, 16580), (1658, 13220), (2644, 8290), (3305, 6632), (3316, 6610), (4145, 5288)]