21140505

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12697}}^1$

素因数の和:12745

約数の個数: 24

約数和(自身を含む): 37636872

約数和(自身を除く): 16496367

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12697, 38091, 63485, 114273, 190455, 469789, 571365, 1409367, 2348945, 4228101, 7046835, 21140505]

約数ペア:

[(1, 21140505), (3, 7046835), (5, 4228101), (9, 2348945), (15, 1409367), (37, 571365), (45, 469789), (111, 190455), (185, 114273), (333, 63485), (555, 38091), (1665, 12697)]