20872940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5581}}^1$

素因数の和:5618

約数の個数: 48

約数和(自身を含む): 50639904

約数和(自身を除く): 29766964

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5581, 11162, 22324, 27905, 55810, 61391, 94877, 111620, 122782, 189754, 245564, 306955, 379508, 474385, 613910, 948770, 1043647, 1227820, 1897540, 2087294, 4174588, 5218235, 10436470, 20872940]

約数ペア:

[(1, 20872940), (2, 10436470), (4, 5218235), (5, 4174588), (10, 2087294), (11, 1897540), (17, 1227820), (20, 1043647), (22, 948770), (34, 613910), (44, 474385), (55, 379508), (68, 306955), (85, 245564), (110, 189754), (170, 122782), (187, 111620), (220, 94877), (340, 61391), (374, 55810), (748, 27905), (935, 22324), (1870, 11162), (3740, 5581)]