19872820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{877}}^1$

素因数の和:1000

約数の個数: 48

約数和(自身を含む): 46021248

約数和(自身を除く): 26148428

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 103, 110, 206, 220, 412, 515, 877, 1030, 1133, 1754, 2060, 2266, 3508, 4385, 4532, 5665, 8770, 9647, 11330, 17540, 19294, 22660, 38588, 48235, 90331, 96470, 180662, 192940, 361324, 451655, 903310, 993641, 1806620, 1987282, 3974564, 4968205, 9936410, 19872820]

約数ペア:

[(1, 19872820), (2, 9936410), (4, 4968205), (5, 3974564), (10, 1987282), (11, 1806620), (20, 993641), (22, 903310), (44, 451655), (55, 361324), (103, 192940), (110, 180662), (206, 96470), (220, 90331), (412, 48235), (515, 38588), (877, 22660), (1030, 19294), (1133, 17540), (1754, 11330), (2060, 9647), (2266, 8770), (3508, 5665), (4385, 4532)]