21141681

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 32237568

約数和(自身を除く): 11095887

約数列:

[1, 3, 11, 33, 43, 47, 129, 141, 317, 473, 517, 951, 1419, 1551, 2021, 3487, 6063, 10461, 13631, 14899, 22231, 40893, 44697, 66693, 149941, 163889, 449823, 491667, 640657, 1921971, 7047227, 21141681]

約数ペア:

[(1, 21141681), (3, 7047227), (11, 1921971), (33, 640657), (43, 491667), (47, 449823), (129, 163889), (141, 149941), (317, 66693), (473, 44697), (517, 40893), (951, 22231), (1419, 14899), (1551, 13631), (2021, 10461), (3487, 6063)]