19821620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10891}}^1$

素因数の和:10920

約数の個数: 48

約数和(自身を含む): 51235968

約数和(自身を除く): 31414348

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10891, 21782, 43564, 54455, 76237, 108910, 141583, 152474, 217820, 283166, 304948, 381185, 566332, 707915, 762370, 991081, 1415830, 1524740, 1982162, 2831660, 3964324, 4955405, 9910810, 19821620]

約数ペア:

[(1, 19821620), (2, 9910810), (4, 4955405), (5, 3964324), (7, 2831660), (10, 1982162), (13, 1524740), (14, 1415830), (20, 991081), (26, 762370), (28, 707915), (35, 566332), (52, 381185), (65, 304948), (70, 283166), (91, 217820), (130, 152474), (140, 141583), (182, 108910), (260, 76237), (364, 54455), (455, 43564), (910, 21782), (1820, 10891)]