21481929

素因数分解:

$3^5\times 7^1\times {\mathrm{73}}^1\times {\mathrm{173}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 37494912

約数和(自身を除く): 16012983

約数列:

[1, 3, 7, 9, 21, 27, 63, 73, 81, 173, 189, 219, 243, 511, 519, 567, 657, 1211, 1533, 1557, 1701, 1971, 3633, 4599, 4671, 5913, 10899, 12629, 13797, 14013, 17739, 32697, 37887, 41391, 42039, 88403, 98091, 113661, 124173, 265209, 294273, 340983, 795627, 1022949, 2386881, 3068847, 7160643, 21481929]

約数ペア:

[(1, 21481929), (3, 7160643), (7, 3068847), (9, 2386881), (21, 1022949), (27, 795627), (63, 340983), (73, 294273), (81, 265209), (173, 124173), (189, 113661), (219, 98091), (243, 88403), (511, 42039), (519, 41391), (567, 37887), (657, 32697), (1211, 17739), (1533, 14013), (1557, 13797), (1701, 12629), (1971, 10899), (3633, 5913), (4599, 4671)]