21007005

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{32569}}^1$

素因数の和:32620

約数の個数: 16

約数和(自身を含む): 34393920

約数和(自身を除く): 13386915

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 32569, 97707, 162845, 488535, 1400467, 4201401, 7002335, 21007005]

約数ペア:

[(1, 21007005), (3, 7002335), (5, 4201401), (15, 1400467), (43, 488535), (129, 162845), (215, 97707), (645, 32569)]