21190910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12539}}^1$

素因数の和:12572

約数の個数: 24

約数和(自身を含む): 41306760

約数和(自身を除く): 20115850

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12539, 25078, 62695, 125390, 163007, 326014, 815035, 1630070, 2119091, 4238182, 10595455, 21190910]

約数ペア:

[(1, 21190910), (2, 10595455), (5, 4238182), (10, 2119091), (13, 1630070), (26, 815035), (65, 326014), (130, 163007), (169, 125390), (338, 62695), (845, 25078), (1690, 12539)]