20941895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{547}}^1$

素因数の和:615

約数の個数: 32

約数和(自身を含む): 29460480

約数和(自身を除く): 8518585

約数列:

[1, 5, 13, 19, 31, 65, 95, 155, 247, 403, 547, 589, 1235, 2015, 2735, 2945, 7111, 7657, 10393, 16957, 35555, 38285, 51965, 84785, 135109, 220441, 322183, 675545, 1102205, 1610915, 4188379, 20941895]

約数ペア:

[(1, 20941895), (5, 4188379), (13, 1610915), (19, 1102205), (31, 675545), (65, 322183), (95, 220441), (155, 135109), (247, 84785), (403, 51965), (547, 38285), (589, 35555), (1235, 16957), (2015, 10393), (2735, 7657), (2945, 7111)]