21279573

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{661}}^1$

素因数の和:754

約数の個数: 36

約数和(自身を含む): 36300108

約数和(自身を除く): 15020535

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 147, 219, 441, 511, 657, 661, 1533, 1983, 3577, 4599, 4627, 5949, 10731, 13881, 32193, 32389, 41643, 48253, 97167, 144759, 291501, 337771, 434277, 1013313, 2364397, 3039939, 7093191, 21279573]

約数ペア:

[(1, 21279573), (3, 7093191), (7, 3039939), (9, 2364397), (21, 1013313), (49, 434277), (63, 337771), (73, 291501), (147, 144759), (219, 97167), (441, 48253), (511, 41643), (657, 32389), (661, 32193), (1533, 13881), (1983, 10731), (3577, 5949), (4599, 4627)]