21840495

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{2089}}^1$

素因数の和:2155

約数の個数: 32

約数和(自身を含む): 37920960

約数和(自身を除く): 16080465

約数列:

[1, 3, 5, 15, 17, 41, 51, 85, 123, 205, 255, 615, 697, 2089, 2091, 3485, 6267, 10445, 10455, 31335, 35513, 85649, 106539, 177565, 256947, 428245, 532695, 1284735, 1456033, 4368099, 7280165, 21840495]

約数ペア:

[(1, 21840495), (3, 7280165), (5, 4368099), (15, 1456033), (17, 1284735), (41, 532695), (51, 428245), (85, 256947), (123, 177565), (205, 106539), (255, 85649), (615, 35513), (697, 31335), (2089, 10455), (2091, 10445), (3485, 6267)]