21987471

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{491}}^1$

素因数の和:587

約数の個数: 32

約数和(自身を含む): 34007040

約数和(自身を除く): 12019569

約数列:

[1, 3, 11, 23, 33, 59, 69, 177, 253, 491, 649, 759, 1357, 1473, 1947, 4071, 5401, 11293, 14927, 16203, 28969, 33879, 44781, 86907, 124223, 318659, 372669, 666287, 955977, 1998861, 7329157, 21987471]

約数ペア:

[(1, 21987471), (3, 7329157), (11, 1998861), (23, 955977), (33, 666287), (59, 372669), (69, 318659), (177, 124223), (253, 86907), (491, 44781), (649, 33879), (759, 28969), (1357, 16203), (1473, 14927), (1947, 11293), (4071, 5401)]