21655881

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{683}}^1$

素因数の和:973

約数の個数: 24

約数和(自身を含む): 33860736

約数和(自身を除く): 12204855

約数列:

[1, 3, 9, 13, 39, 117, 271, 683, 813, 2049, 2439, 3523, 6147, 8879, 10569, 26637, 31707, 79911, 185093, 555279, 1665837, 2406209, 7218627, 21655881]

約数ペア:

[(1, 21655881), (3, 7218627), (9, 2406209), (13, 1665837), (39, 555279), (117, 185093), (271, 79911), (683, 31707), (813, 26637), (2049, 10569), (2439, 8879), (3523, 6147)]