1640817

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:490

約数の個数: 20

約数和(自身を含む): 2509056

約数和(自身を除く): 868239

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 431, 1269, 1293, 3807, 3879, 11637, 20257, 34911, 60771, 182313, 546939, 1640817]

約数ペア:

[(1, 1640817), (3, 546939), (9, 182313), (27, 60771), (47, 34911), (81, 20257), (141, 11637), (423, 3879), (431, 3807), (1269, 1293)]