21046940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25667}}^1$

素因数の和:25717

約数の個数: 24

約数和(自身を含む): 45278352

約数和(自身を除く): 24231412

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25667, 51334, 102668, 128335, 256670, 513340, 1052347, 2104694, 4209388, 5261735, 10523470, 21046940]

約数ペア:

[(1, 21046940), (2, 10523470), (4, 5261735), (5, 4209388), (10, 2104694), (20, 1052347), (41, 513340), (82, 256670), (164, 128335), (205, 102668), (410, 51334), (820, 25667)]