21745540

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13763}}^1$

素因数の和:13851

約数の個数: 24

約数和(自身を含む): 46247040

約数和(自身を除く): 24501500

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13763, 27526, 55052, 68815, 137630, 275260, 1087277, 2174554, 4349108, 5436385, 10872770, 21745540]

約数ペア:

[(1, 21745540), (2, 10872770), (4, 5436385), (5, 4349108), (10, 2174554), (20, 1087277), (79, 275260), (158, 137630), (316, 68815), (395, 55052), (790, 27526), (1580, 13763)]