20921005

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{13901}}^1$

素因数の和:13956

約数の個数: 16

約数和(自身を含む): 29361024

約数和(自身を除く): 8440019

約数列:

[1, 5, 7, 35, 43, 215, 301, 1505, 13901, 69505, 97307, 486535, 597743, 2988715, 4184201, 20921005]

約数ペア:

[(1, 20921005), (5, 4184201), (7, 2988715), (35, 597743), (43, 486535), (215, 97307), (301, 69505), (1505, 13901)]