1221885

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{431}}^1$

素因数の和:455

約数の個数: 40

約数和(自身を含む): 2509056

約数和(自身を除く): 1287171

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 431, 567, 945, 1293, 2155, 2835, 3017, 3879, 6465, 9051, 11637, 15085, 19395, 27153, 34911, 45255, 58185, 81459, 135765, 174555, 244377, 407295, 1221885]

約数ペア:

[(1, 1221885), (3, 407295), (5, 244377), (7, 174555), (9, 135765), (15, 81459), (21, 58185), (27, 45255), (35, 34911), (45, 27153), (63, 19395), (81, 15085), (105, 11637), (135, 9051), (189, 6465), (315, 3879), (405, 3017), (431, 2835), (567, 2155), (945, 1293)]