21212763

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 33530112

約数和(自身を除く): 12317349

約数列:

[1, 3, 11, 13, 33, 39, 143, 197, 251, 429, 591, 753, 2167, 2561, 2761, 3263, 6501, 7683, 8283, 9789, 28171, 35893, 49447, 84513, 107679, 148341, 543917, 642811, 1631751, 1928433, 7070921, 21212763]

約数ペア:

[(1, 21212763), (3, 7070921), (11, 1928433), (13, 1631751), (33, 642811), (39, 543917), (143, 148341), (197, 107679), (251, 84513), (429, 49447), (591, 35893), (753, 28171), (2167, 9789), (2561, 8283), (2761, 7683), (3263, 6501)]