21940815

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{3041}}^1$

素因数の和:3099

約数の個数: 32

約数和(自身を含む): 38840256

約数和(自身を除く): 16899441

約数列:

[1, 3, 5, 13, 15, 37, 39, 65, 111, 185, 195, 481, 555, 1443, 2405, 3041, 7215, 9123, 15205, 39533, 45615, 112517, 118599, 197665, 337551, 562585, 592995, 1462721, 1687755, 4388163, 7313605, 21940815]

約数ペア:

[(1, 21940815), (3, 7313605), (5, 4388163), (13, 1687755), (15, 1462721), (37, 592995), (39, 562585), (65, 337551), (111, 197665), (185, 118599), (195, 112517), (481, 45615), (555, 39533), (1443, 15205), (2405, 9123), (3041, 7215)]