81697460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{1579}}^1$

素因数の和:1800

約数の個数: 48

約数和(自身を含む): 185808000

約数和(自身を除く): 104110540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 398, 796, 995, 1579, 1990, 2587, 3158, 3980, 5174, 6316, 7895, 10348, 12935, 15790, 20527, 25870, 31580, 41054, 51740, 82108, 102635, 205270, 314221, 410540, 628442, 1256884, 1571105, 3142210, 4084873, 6284420, 8169746, 16339492, 20424365, 40848730, 81697460]

約数ペア:

[(1, 81697460), (2, 40848730), (4, 20424365), (5, 16339492), (10, 8169746), (13, 6284420), (20, 4084873), (26, 3142210), (52, 1571105), (65, 1256884), (130, 628442), (199, 410540), (260, 314221), (398, 205270), (796, 102635), (995, 82108), (1579, 51740), (1990, 41054), (2587, 31580), (3158, 25870), (3980, 20527), (5174, 15790), (6316, 12935), (7895, 10348)]