21981604

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{269}}^1\times {\mathrm{659}}^1$

素因数の和:963

約数の個数: 24

約数和(自身を含む): 39916800

約数和(自身を除く): 17935196

約数列:

[1, 2, 4, 31, 62, 124, 269, 538, 659, 1076, 1318, 2636, 8339, 16678, 20429, 33356, 40858, 81716, 177271, 354542, 709084, 5495401, 10990802, 21981604]

約数ペア:

[(1, 21981604), (2, 10990802), (4, 5495401), (31, 709084), (62, 354542), (124, 177271), (269, 81716), (538, 40858), (659, 33356), (1076, 20429), (1318, 16678), (2636, 8339)]