20913904

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{331}}^1\times {\mathrm{359}}^1$

素因数の和:709

約数の個数: 40

約数和(自身を含む): 44461440

約数和(自身を除く): 23547536

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 331, 359, 662, 718, 1324, 1436, 2648, 2872, 3641, 3949, 5296, 5744, 7282, 7898, 14564, 15796, 29128, 31592, 58256, 63184, 118829, 237658, 475316, 950632, 1307119, 1901264, 2614238, 5228476, 10456952, 20913904]

約数ペア:

[(1, 20913904), (2, 10456952), (4, 5228476), (8, 2614238), (11, 1901264), (16, 1307119), (22, 950632), (44, 475316), (88, 237658), (176, 118829), (331, 63184), (359, 58256), (662, 31592), (718, 29128), (1324, 15796), (1436, 14564), (2648, 7898), (2872, 7282), (3641, 5744), (3949, 5296)]