21504656

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{557}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 44282880

約数和(自身を除く): 22778224

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 127, 152, 254, 304, 508, 557, 1016, 1114, 2032, 2228, 2413, 4456, 4826, 8912, 9652, 10583, 19304, 21166, 38608, 42332, 70739, 84664, 141478, 169328, 282956, 565912, 1131824, 1344041, 2688082, 5376164, 10752328, 21504656]

約数ペア:

[(1, 21504656), (2, 10752328), (4, 5376164), (8, 2688082), (16, 1344041), (19, 1131824), (38, 565912), (76, 282956), (127, 169328), (152, 141478), (254, 84664), (304, 70739), (508, 42332), (557, 38608), (1016, 21166), (1114, 19304), (2032, 10583), (2228, 9652), (2413, 8912), (4456, 4826)]