21726549

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{439}}^1$

素因数の和:511

約数の個数: 40

約数和(自身を含む): 35777280

約数和(自身を除く): 14050731

約数列:

[1, 3, 9, 13, 27, 39, 47, 81, 117, 141, 351, 423, 439, 611, 1053, 1269, 1317, 1833, 3807, 3951, 5499, 5707, 11853, 16497, 17121, 20633, 35559, 49491, 51363, 61899, 154089, 185697, 268229, 462267, 557091, 804687, 1671273, 2414061, 7242183, 21726549]

約数ペア:

[(1, 21726549), (3, 7242183), (9, 2414061), (13, 1671273), (27, 804687), (39, 557091), (47, 462267), (81, 268229), (117, 185697), (141, 154089), (351, 61899), (423, 51363), (439, 49491), (611, 35559), (1053, 20633), (1269, 17121), (1317, 16497), (1833, 11853), (3807, 5707), (3951, 5499)]