21045207

素因数分解:

$3^1\times {\mathrm{23}}^2\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:287

約数の個数: 24

約数和(自身を含む): 29862000

約数和(自身を除く): 8816793

約数列:

[1, 3, 23, 69, 89, 149, 267, 447, 529, 1587, 2047, 3427, 6141, 10281, 13261, 39783, 47081, 78821, 141243, 236463, 305003, 915009, 7015069, 21045207]

約数ペア:

[(1, 21045207), (3, 7015069), (23, 915009), (69, 305003), (89, 236463), (149, 141243), (267, 78821), (447, 47081), (529, 39783), (1587, 13261), (2047, 10281), (3427, 6141)]