20642215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4217}}^1$

素因数の和:4322

約数の個数: 16

約数和(自身を含む): 27332640

約数和(自身を除く): 6690425

約数列:

[1, 5, 11, 55, 89, 445, 979, 4217, 4895, 21085, 46387, 231935, 375313, 1876565, 4128443, 20642215]

約数ペア:

[(1, 20642215), (5, 4128443), (11, 1876565), (55, 375313), (89, 231935), (445, 46387), (979, 21085), (4217, 4895)]