21252015

素因数分解:

$3^2\times 5^1\times {\mathrm{347}}^1\times {\mathrm{1361}}^1$

素因数の和:1719

約数の個数: 24

約数和(自身を含む): 36970128

約数和(自身を除く): 15718113

約数列:

[1, 3, 5, 9, 15, 45, 347, 1041, 1361, 1735, 3123, 4083, 5205, 6805, 12249, 15615, 20415, 61245, 472267, 1416801, 2361335, 4250403, 7084005, 21252015]

約数ペア:

[(1, 21252015), (3, 7084005), (5, 4250403), (9, 2361335), (15, 1416801), (45, 472267), (347, 61245), (1041, 20415), (1361, 15615), (1735, 12249), (3123, 6805), (4083, 5205)]