21731985

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1021}}^1$

素因数の和:1086

約数の個数: 48

約数和(自身を含む): 42090048

約数和(自身を除く): 20358063

約数列:

[1, 3, 5, 9, 11, 15, 33, 43, 45, 55, 99, 129, 165, 215, 387, 473, 495, 645, 1021, 1419, 1935, 2365, 3063, 4257, 5105, 7095, 9189, 11231, 15315, 21285, 33693, 43903, 45945, 56155, 101079, 131709, 168465, 219515, 395127, 482933, 505395, 658545, 1448799, 1975635, 2414665, 4346397, 7243995, 21731985]

約数ペア:

[(1, 21731985), (3, 7243995), (5, 4346397), (9, 2414665), (11, 1975635), (15, 1448799), (33, 658545), (43, 505395), (45, 482933), (55, 395127), (99, 219515), (129, 168465), (165, 131709), (215, 101079), (387, 56155), (473, 45945), (495, 43903), (645, 33693), (1021, 21285), (1419, 15315), (1935, 11231), (2365, 9189), (3063, 7095), (4257, 5105)]