20971795

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18979}}^1$

素因数の和:19014

約数の個数: 16

約数和(自身を含む): 28697760

約数和(自身を除く): 7725965

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18979, 94895, 246727, 322643, 1233635, 1613215, 4194359, 20971795]

約数ペア:

[(1, 20971795), (5, 4194359), (13, 1613215), (17, 1233635), (65, 322643), (85, 246727), (221, 94895), (1105, 18979)]