21214385

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 28449792

約数和(自身を除く): 7235407

約数列:

[1, 5, 17, 31, 83, 85, 97, 155, 415, 485, 527, 1411, 1649, 2573, 2635, 3007, 7055, 8051, 8245, 12865, 15035, 40255, 43741, 51119, 136867, 218705, 249581, 255595, 684335, 1247905, 4242877, 21214385]

約数ペア:

[(1, 21214385), (5, 4242877), (17, 1247905), (31, 684335), (83, 255595), (85, 249581), (97, 218705), (155, 136867), (415, 51119), (485, 43741), (527, 40255), (1411, 15035), (1649, 12865), (2573, 8245), (2635, 8051), (3007, 7055)]