21197295

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7477}}^1$

素因数の和:7501

約数の個数: 40

約数和(自身を含む): 43432224

約数和(自身を除く): 22234929

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7477, 22431, 37385, 52339, 67293, 112155, 157017, 201879, 261695, 336465, 471051, 605637, 785085, 1009395, 1413153, 2355255, 3028185, 4239459, 7065765, 21197295]

約数ペア:

[(1, 21197295), (3, 7065765), (5, 4239459), (7, 3028185), (9, 2355255), (15, 1413153), (21, 1009395), (27, 785085), (35, 605637), (45, 471051), (63, 336465), (81, 261695), (105, 201879), (135, 157017), (189, 112155), (315, 67293), (405, 52339), (567, 37385), (945, 22431), (2835, 7477)]