20390045

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{373}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 27363336

約数和(自身を除く): 6973291

約数列:

[1, 5, 13, 29, 65, 145, 373, 377, 841, 1865, 1885, 4205, 4849, 10817, 10933, 24245, 54085, 54665, 140621, 313693, 703105, 1568465, 4078009, 20390045]

約数ペア:

[(1, 20390045), (5, 4078009), (13, 1568465), (29, 703105), (65, 313693), (145, 140621), (373, 54665), (377, 54085), (841, 24245), (1865, 10933), (1885, 10817), (4205, 4849)]