21389848

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{127}}^1\times {\mathrm{569}}^1$

素因数の和:739

約数の個数: 32

約数和(自身を含む): 41587200

約数和(自身を除く): 20197352

約数列:

[1, 2, 4, 8, 37, 74, 127, 148, 254, 296, 508, 569, 1016, 1138, 2276, 4552, 4699, 9398, 18796, 21053, 37592, 42106, 72263, 84212, 144526, 168424, 289052, 578104, 2673731, 5347462, 10694924, 21389848]

約数ペア:

[(1, 21389848), (2, 10694924), (4, 5347462), (8, 2673731), (37, 578104), (74, 289052), (127, 168424), (148, 144526), (254, 84212), (296, 72263), (508, 42106), (569, 37592), (1016, 21053), (1138, 18796), (2276, 9398), (4552, 4699)]