21445540

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12919}}^1$

素因数の和:13011

約数の個数: 24

約数和(自身を含む): 45581760

約数和(自身を除く): 24136220

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12919, 25838, 51676, 64595, 129190, 258380, 1072277, 2144554, 4289108, 5361385, 10722770, 21445540]

約数ペア:

[(1, 21445540), (2, 10722770), (4, 5361385), (5, 4289108), (10, 2144554), (20, 1072277), (83, 258380), (166, 129190), (332, 64595), (415, 51676), (830, 25838), (1660, 12919)]