21140271

素因数分解:

$3^6\times {\mathrm{47}}^1\times {\mathrm{617}}^1$

素因数の和:682

約数の個数: 28

約数和(自身を含む): 32422752

約数和(自身を除く): 11282481

約数列:

[1, 3, 9, 27, 47, 81, 141, 243, 423, 617, 729, 1269, 1851, 3807, 5553, 11421, 16659, 28999, 34263, 49977, 86997, 149931, 260991, 449793, 782973, 2348919, 7046757, 21140271]

約数ペア:

[(1, 21140271), (3, 7046757), (9, 2348919), (27, 782973), (47, 449793), (81, 260991), (141, 149931), (243, 86997), (423, 49977), (617, 34263), (729, 28999), (1269, 16659), (1851, 11421), (3807, 5553)]