21730821

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{17539}}^1$

素因数の和:17608

約数の個数: 16

約数和(自身を含む): 33676800

約数和(自身を除く): 11945979

約数列:

[1, 3, 7, 21, 59, 177, 413, 1239, 17539, 52617, 122773, 368319, 1034801, 3104403, 7243607, 21730821]

約数ペア:

[(1, 21730821), (3, 7243607), (7, 3104403), (21, 1034801), (59, 368319), (177, 122773), (413, 52617), (1239, 17539)]