21205648

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{163}}^1\times {\mathrm{173}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 42461568

約数和(自身を除く): 21255920

約数列:

[1, 2, 4, 8, 16, 47, 94, 163, 173, 188, 326, 346, 376, 652, 692, 752, 1304, 1384, 2608, 2768, 7661, 8131, 15322, 16262, 28199, 30644, 32524, 56398, 61288, 65048, 112796, 122576, 130096, 225592, 451184, 1325353, 2650706, 5301412, 10602824, 21205648]

約数ペア:

[(1, 21205648), (2, 10602824), (4, 5301412), (8, 2650706), (16, 1325353), (47, 451184), (94, 225592), (163, 130096), (173, 122576), (188, 112796), (326, 65048), (346, 61288), (376, 56398), (652, 32524), (692, 30644), (752, 28199), (1304, 16262), (1384, 15322), (2608, 8131), (2768, 7661)]