21195243

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{757}}^1$

素因数の和:844

約数の個数: 32

約数和(自身を含む): 33837120

約数和(自身を除く): 12641877

約数列:

[1, 3, 9, 17, 27, 51, 61, 153, 183, 459, 549, 757, 1037, 1647, 2271, 3111, 6813, 9333, 12869, 20439, 27999, 38607, 46177, 115821, 138531, 347463, 415593, 785009, 1246779, 2355027, 7065081, 21195243]

約数ペア:

[(1, 21195243), (3, 7065081), (9, 2355027), (17, 1246779), (27, 785009), (51, 415593), (61, 347463), (153, 138531), (183, 115821), (459, 46177), (549, 38607), (757, 27999), (1037, 20439), (1647, 12869), (2271, 9333), (3111, 6813)]