1640993985

素因数分解:

$3^4\times 5^1\times {\mathrm{4051837}}^1$

素因数の和:4051854

約数の個数: 20

約数和(自身を含む): 2941634388

約数和(自身を除く): 1300640403

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 4051837, 12155511, 20259185, 36466533, 60777555, 109399599, 182332665, 328198797, 546997995, 1640993985]

約数ペア:

[(1, 1640993985), (3, 546997995), (5, 328198797), (9, 182332665), (15, 109399599), (27, 60777555), (45, 36466533), (81, 20259185), (135, 12155511), (405, 4051837)]