20571813

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13367}}^1$

素因数の和:13398

約数の個数: 20

約数和(自身を含む): 32350560

約数和(自身を除く): 11778747

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13367, 40101, 120303, 253973, 360909, 761919, 1082727, 2285757, 6857271, 20571813]

約数ペア:

[(1, 20571813), (3, 6857271), (9, 2285757), (19, 1082727), (27, 761919), (57, 360909), (81, 253973), (171, 120303), (513, 40101), (1539, 13367)]