21402380

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12893}}^1$

素因数の和:12985

約数の個数: 24

約数和(自身を含む): 45490032

約数和(自身を除く): 24087652

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12893, 25786, 51572, 64465, 128930, 257860, 1070119, 2140238, 4280476, 5350595, 10701190, 21402380]

約数ペア:

[(1, 21402380), (2, 10701190), (4, 5350595), (5, 4280476), (10, 2140238), (20, 1070119), (83, 257860), (166, 128930), (332, 64465), (415, 51572), (830, 25786), (1660, 12893)]