21327867

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 35642880

約数和(自身を除く): 14315013

約数列:

[1, 3, 9, 11, 27, 33, 79, 81, 99, 101, 237, 243, 297, 303, 711, 869, 891, 909, 1111, 2133, 2607, 2673, 2727, 3333, 6399, 7821, 7979, 8181, 9999, 19197, 23463, 23937, 24543, 29997, 70389, 71811, 87769, 89991, 211167, 215433, 263307, 269973, 646299, 789921, 1938897, 2369763, 7109289, 21327867]

約数ペア:

[(1, 21327867), (3, 7109289), (9, 2369763), (11, 1938897), (27, 789921), (33, 646299), (79, 269973), (81, 263307), (99, 215433), (101, 211167), (237, 89991), (243, 87769), (297, 71811), (303, 70389), (711, 29997), (869, 24543), (891, 23937), (909, 23463), (1111, 19197), (2133, 9999), (2607, 8181), (2673, 7979), (2727, 7821), (3333, 6399)]