21268215

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20549}}^1$

素因数の和:20583

約数の個数: 24

約数和(自身を含む): 38469600

約数和(自身を除く): 17201385

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20549, 61647, 102745, 184941, 308235, 472627, 924705, 1417881, 2363135, 4253643, 7089405, 21268215]

約数ペア:

[(1, 21268215), (3, 7089405), (5, 4253643), (9, 2363135), (15, 1417881), (23, 924705), (45, 472627), (69, 308235), (115, 184941), (207, 102745), (345, 61647), (1035, 20549)]