21335980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12853}}^1$

素因数の和:12945

約数の個数: 24

約数和(自身を含む): 45348912

約数和(自身を除く): 24012932

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12853, 25706, 51412, 64265, 128530, 257060, 1066799, 2133598, 4267196, 5333995, 10667990, 21335980]

約数ペア:

[(1, 21335980), (2, 10667990), (4, 5333995), (5, 4267196), (10, 2133598), (20, 1066799), (83, 257060), (166, 128530), (332, 64265), (415, 51412), (830, 25706), (1660, 12853)]