21908187

素因数分解:

$3^2\times 7^1\times {\mathrm{317}}^1\times {\mathrm{1097}}^1$

素因数の和:1427

約数の個数: 24

約数和(自身を含む): 36313056

約数和(自身を除く): 14404869

約数列:

[1, 3, 7, 9, 21, 63, 317, 951, 1097, 2219, 2853, 3291, 6657, 7679, 9873, 19971, 23037, 69111, 347749, 1043247, 2434243, 3129741, 7302729, 21908187]

約数ペア:

[(1, 21908187), (3, 7302729), (7, 3129741), (9, 2434243), (21, 1043247), (63, 347749), (317, 69111), (951, 23037), (1097, 19971), (2219, 9873), (2853, 7679), (3291, 6657)]