21166365

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{787}}^1$

素因数の和:969

約数の個数: 32

約数和(自身を含む): 37218816

約数和(自身を除く): 16052451

約数列:

[1, 3, 5, 11, 15, 33, 55, 163, 165, 489, 787, 815, 1793, 2361, 2445, 3935, 5379, 8657, 8965, 11805, 25971, 26895, 43285, 128281, 129855, 384843, 641405, 1411091, 1924215, 4233273, 7055455, 21166365]

約数ペア:

[(1, 21166365), (3, 7055455), (5, 4233273), (11, 1924215), (15, 1411091), (33, 641405), (55, 384843), (163, 129855), (165, 128281), (489, 43285), (787, 26895), (815, 25971), (1793, 11805), (2361, 8965), (2445, 8657), (3935, 5379)]