21387784

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{359}}^1\times {\mathrm{677}}^1$

素因数の和:1053

約数の個数: 32

約数和(自身を含む): 43934400

約数和(自身を除く): 22546616

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 359, 677, 718, 1354, 1436, 2708, 2872, 3949, 5416, 7447, 7898, 14894, 15796, 29788, 31592, 59576, 243043, 486086, 972172, 1944344, 2673473, 5346946, 10693892, 21387784]

約数ペア:

[(1, 21387784), (2, 10693892), (4, 5346946), (8, 2673473), (11, 1944344), (22, 972172), (44, 486086), (88, 243043), (359, 59576), (677, 31592), (718, 29788), (1354, 15796), (1436, 14894), (2708, 7898), (2872, 7447), (3949, 5416)]