21661281

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{4567}}^1$

素因数の和:4621

約数の個数: 24

約数和(自身を含む): 34205184

約数和(自身を除く): 12543903

約数列:

[1, 3, 9, 17, 31, 51, 93, 153, 279, 527, 1581, 4567, 4743, 13701, 41103, 77639, 141577, 232917, 424731, 698751, 1274193, 2406809, 7220427, 21661281]

約数ペア:

[(1, 21661281), (3, 7220427), (9, 2406809), (17, 1274193), (31, 698751), (51, 424731), (93, 232917), (153, 141577), (279, 77639), (527, 41103), (1581, 13701), (4567, 4743)]