21193569

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:371

約数の個数: 40

約数和(自身を含む): 34151040

約数和(自身を除く): 12957471

約数列:

[1, 3, 9, 19, 27, 47, 57, 81, 141, 171, 293, 423, 513, 879, 893, 1269, 1539, 2637, 2679, 3807, 5567, 7911, 8037, 13771, 16701, 23733, 24111, 41313, 50103, 72333, 123939, 150309, 261649, 371817, 450927, 784947, 1115451, 2354841, 7064523, 21193569]

約数ペア:

[(1, 21193569), (3, 7064523), (9, 2354841), (19, 1115451), (27, 784947), (47, 450927), (57, 371817), (81, 261649), (141, 150309), (171, 123939), (293, 72333), (423, 50103), (513, 41313), (879, 24111), (893, 23733), (1269, 16701), (1539, 13771), (2637, 8037), (2679, 7911), (3807, 5567)]