21086980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12703}}^1$

素因数の和:12795

約数の個数: 24

約数和(自身を含む): 44819712

約数和(自身を除く): 23732732

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12703, 25406, 50812, 63515, 127030, 254060, 1054349, 2108698, 4217396, 5271745, 10543490, 21086980]

約数ペア:

[(1, 21086980), (2, 10543490), (4, 5271745), (5, 4217396), (10, 2108698), (20, 1054349), (83, 254060), (166, 127030), (332, 63515), (415, 50812), (830, 25406), (1660, 12703)]