21259743

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{661}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 28979712

約数和(自身を除く): 7719969

約数列:

[1, 3, 71, 151, 213, 453, 661, 1983, 10721, 32163, 46931, 99811, 140793, 299433, 7086581, 21259743]

約数ペア:

[(1, 21259743), (3, 7086581), (71, 299433), (151, 140793), (213, 99811), (453, 46931), (661, 32163), (1983, 10721)]