20891065

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{971}}^1$

素因数の和:1320

約数の個数: 16

約数和(自身を含む): 27107136

約数和(自身を除く): 6216071

約数列:

[1, 5, 13, 65, 331, 971, 1655, 4303, 4855, 12623, 21515, 63115, 321401, 1607005, 4178213, 20891065]

約数ペア:

[(1, 20891065), (5, 4178213), (13, 1607005), (65, 321401), (331, 63115), (971, 21515), (1655, 12623), (4303, 4855)]