20787615

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{593}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 38918880

約数和(自身を除く): 18131265

約数列:

[1, 3, 5, 9, 15, 19, 41, 45, 57, 95, 123, 171, 205, 285, 369, 593, 615, 779, 855, 1779, 1845, 2337, 2965, 3895, 5337, 7011, 8895, 11267, 11685, 24313, 26685, 33801, 35055, 56335, 72939, 101403, 121565, 169005, 218817, 364695, 461947, 507015, 1094085, 1385841, 2309735, 4157523, 6929205, 20787615]

約数ペア:

[(1, 20787615), (3, 6929205), (5, 4157523), (9, 2309735), (15, 1385841), (19, 1094085), (41, 507015), (45, 461947), (57, 364695), (95, 218817), (123, 169005), (171, 121565), (205, 101403), (285, 72939), (369, 56335), (593, 35055), (615, 33801), (779, 26685), (855, 24313), (1779, 11685), (1845, 11267), (2337, 8895), (2965, 7011), (3895, 5337)]