21789957

素因数分解:

$3^1\times 7^2\times {\mathrm{227}}^1\times {\mathrm{653}}^1$

素因数の和:897

約数の個数: 24

約数和(自身を含む): 33997536

約数和(自身を除く): 12207579

約数列:

[1, 3, 7, 21, 49, 147, 227, 653, 681, 1589, 1959, 4571, 4767, 11123, 13713, 31997, 33369, 95991, 148231, 444693, 1037617, 3112851, 7263319, 21789957]

約数ペア:

[(1, 21789957), (3, 7263319), (7, 3112851), (21, 1037617), (49, 444693), (147, 148231), (227, 95991), (653, 33369), (681, 31997), (1589, 13713), (1959, 11123), (4571, 4767)]