21498705

素因数分解:

$3^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{743}}^1$

素因数の和:1397

約数の個数: 24

約数和(自身を含む): 37372608

約数和(自身を除く): 15873903

約数列:

[1, 3, 5, 9, 15, 45, 643, 743, 1929, 2229, 3215, 3715, 5787, 6687, 9645, 11145, 28935, 33435, 477749, 1433247, 2388745, 4299741, 7166235, 21498705]

約数ペア:

[(1, 21498705), (3, 7166235), (5, 4299741), (9, 2388745), (15, 1433247), (45, 477749), (643, 33435), (743, 28935), (1929, 11145), (2229, 9645), (3215, 6687), (3715, 5787)]