21172995

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2273}}^1$

素因数の和:2313

約数の個数: 40

約数和(自身を含む): 39622176

約数和(自身を除く): 18449181

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 345, 405, 621, 1035, 1863, 2273, 3105, 6819, 9315, 11365, 20457, 34095, 52279, 61371, 102285, 156837, 184113, 261395, 306855, 470511, 784185, 920565, 1411533, 2352555, 4234599, 7057665, 21172995]

約数ペア:

[(1, 21172995), (3, 7057665), (5, 4234599), (9, 2352555), (15, 1411533), (23, 920565), (27, 784185), (45, 470511), (69, 306855), (81, 261395), (115, 184113), (135, 156837), (207, 102285), (345, 61371), (405, 52279), (621, 34095), (1035, 20457), (1863, 11365), (2273, 9315), (3105, 6819)]