20802145

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{349}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 31046400

約数和(自身を除く): 10244255

約数列:

[1, 5, 7, 13, 35, 65, 91, 131, 349, 455, 655, 917, 1703, 1745, 2443, 4537, 4585, 8515, 11921, 12215, 22685, 31759, 45719, 59605, 158795, 228595, 320033, 594347, 1600165, 2971735, 4160429, 20802145]

約数ペア:

[(1, 20802145), (5, 4160429), (7, 2971735), (13, 1600165), (35, 594347), (65, 320033), (91, 228595), (131, 158795), (349, 59605), (455, 45719), (655, 31759), (917, 22685), (1703, 12215), (1745, 11921), (2443, 8515), (4537, 4585)]