21189927

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 32060160

約数和(自身を除く): 10870233

約数列:

[1, 3, 11, 33, 43, 109, 129, 137, 327, 411, 473, 1199, 1419, 1507, 3597, 4521, 4687, 5891, 14061, 14933, 17673, 44799, 51557, 64801, 154671, 164263, 194403, 492789, 642119, 1926357, 7063309, 21189927]

約数ペア:

[(1, 21189927), (3, 7063309), (11, 1926357), (33, 642119), (43, 492789), (109, 194403), (129, 164263), (137, 154671), (327, 64801), (411, 51557), (473, 44799), (1199, 17673), (1419, 14933), (1507, 14061), (3597, 5891), (4521, 4687)]