21217857

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{337}}^1\times {\mathrm{677}}^1$

素因数の和:1048

約数の個数: 16

約数和(自身を含む): 29332992

約数和(自身を除く): 8115135

約数列:

[1, 3, 31, 93, 337, 677, 1011, 2031, 10447, 20987, 31341, 62961, 228149, 684447, 7072619, 21217857]

約数ペア:

[(1, 21217857), (3, 7072619), (31, 684447), (93, 228149), (337, 62961), (677, 31341), (1011, 20987), (2031, 10447)]