12780020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{5281}}^1$

素因数の和:5312

約数の個数: 36

約数和(自身を含む): 29505252

約数和(自身を除く): 16725232

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 5281, 10562, 21124, 26405, 52810, 58091, 105620, 116182, 232364, 290455, 580910, 639001, 1161820, 1278002, 2556004, 3195005, 6390010, 12780020]

約数ペア:

[(1, 12780020), (2, 6390010), (4, 3195005), (5, 2556004), (10, 1278002), (11, 1161820), (20, 639001), (22, 580910), (44, 290455), (55, 232364), (110, 116182), (121, 105620), (220, 58091), (242, 52810), (484, 26405), (605, 21124), (1210, 10562), (2420, 5281)]