20557905

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{1361}}^1$

素因数の和:1441

約数の個数: 32

約数和(自身を含む): 35303040

約数和(自身を除く): 14745135

約数列:

[1, 3, 5, 15, 19, 53, 57, 95, 159, 265, 285, 795, 1007, 1361, 3021, 4083, 5035, 6805, 15105, 20415, 25859, 72133, 77577, 129295, 216399, 360665, 387885, 1081995, 1370527, 4111581, 6852635, 20557905]

約数ペア:

[(1, 20557905), (3, 6852635), (5, 4111581), (15, 1370527), (19, 1081995), (53, 387885), (57, 360665), (95, 216399), (159, 129295), (265, 77577), (285, 72133), (795, 25859), (1007, 20415), (1361, 15105), (3021, 6805), (4083, 5035)]