21279753

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:464

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 15411447

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 81, 99, 171, 209, 243, 297, 419, 513, 627, 891, 1257, 1539, 1881, 2673, 3771, 4609, 4617, 5643, 7961, 11313, 13827, 16929, 23883, 33939, 41481, 50787, 71649, 87571, 101817, 124443, 214947, 262713, 373329, 644841, 788139, 1119987, 1934523, 2364417, 7093251, 21279753]

約数ペア:

[(1, 21279753), (3, 7093251), (9, 2364417), (11, 1934523), (19, 1119987), (27, 788139), (33, 644841), (57, 373329), (81, 262713), (99, 214947), (171, 124443), (209, 101817), (243, 87571), (297, 71649), (419, 50787), (513, 41481), (627, 33939), (891, 23883), (1257, 16929), (1539, 13827), (1881, 11313), (2673, 7961), (3771, 5643), (4609, 4617)]