19881897

素因数分解:

$3^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{641}}^1$

素因数の和:869

約数の個数: 24

約数和(自身を含む): 31031712

約数和(自身を除く): 11149815

約数列:

[1, 3, 7, 21, 49, 147, 211, 633, 641, 1477, 1923, 4431, 4487, 10339, 13461, 31017, 31409, 94227, 135251, 405753, 946757, 2840271, 6627299, 19881897]

約数ペア:

[(1, 19881897), (3, 6627299), (7, 2840271), (21, 946757), (49, 405753), (147, 135251), (211, 94227), (633, 31409), (641, 31017), (1477, 13461), (1923, 10339), (4431, 4487)]