21581332

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{269}}^1\times {\mathrm{647}}^1$

素因数の和:951

約数の個数: 24

約数和(自身を含む): 39191040

約数和(自身を除く): 17609708

約数列:

[1, 2, 4, 31, 62, 124, 269, 538, 647, 1076, 1294, 2588, 8339, 16678, 20057, 33356, 40114, 80228, 174043, 348086, 696172, 5395333, 10790666, 21581332]

約数ペア:

[(1, 21581332), (2, 10790666), (4, 5395333), (31, 696172), (62, 348086), (124, 174043), (269, 80228), (538, 40114), (647, 33356), (1076, 20057), (1294, 16678), (2588, 8339)]