20864985

素因数分解:

$3^1\times 5^1\times {\mathrm{269}}^1\times {\mathrm{5171}}^1$

素因数の和:5448

約数の個数: 16

約数和(自身を含む): 33514560

約数和(自身を除く): 12649575

約数列:

[1, 3, 5, 15, 269, 807, 1345, 4035, 5171, 15513, 25855, 77565, 1390999, 4172997, 6954995, 20864985]

約数ペア:

[(1, 20864985), (3, 6954995), (5, 4172997), (15, 1390999), (269, 77565), (807, 25855), (1345, 15513), (4035, 5171)]