21251380

素因数分解:

$2^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{4409}}^1$

素因数の和:4659

約数の個数: 24

約数和(自身を含む): 44823240

約数和(自身を除く): 23571860

約数列:

[1, 2, 4, 5, 10, 20, 241, 482, 964, 1205, 2410, 4409, 4820, 8818, 17636, 22045, 44090, 88180, 1062569, 2125138, 4250276, 5312845, 10625690, 21251380]

約数ペア:

[(1, 21251380), (2, 10625690), (4, 5312845), (5, 4250276), (10, 2125138), (20, 1062569), (241, 88180), (482, 44090), (964, 22045), (1205, 17636), (2410, 8818), (4409, 4820)]