1640894787

素因数分解:

$3^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{163811}}^1$

素因数の和:163880

約数の個数: 32

約数和(自身を含む): 2830671360

約数和(自身を除く): 1189776573

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 159, 189, 371, 477, 1113, 1431, 3339, 10017, 163811, 491433, 1146677, 1474299, 3440031, 4422897, 8681983, 10320093, 26045949, 30960279, 60773881, 78137847, 182321643, 234413541, 546964929, 1640894787]

約数ペア:

[(1, 1640894787), (3, 546964929), (7, 234413541), (9, 182321643), (21, 78137847), (27, 60773881), (53, 30960279), (63, 26045949), (159, 10320093), (189, 8681983), (371, 4422897), (477, 3440031), (1113, 1474299), (1431, 1146677), (3339, 491433), (10017, 163811)]