21213279

素因数分解:

$3^3\times {\mathrm{149}}^1\times {\mathrm{5273}}^1$

素因数の和:5431

約数の個数: 16

約数和(自身を含む): 31644000

約数和(自身を除く): 10430721

約数列:

[1, 3, 9, 27, 149, 447, 1341, 4023, 5273, 15819, 47457, 142371, 785677, 2357031, 7071093, 21213279]

約数ペア:

[(1, 21213279), (3, 7071093), (9, 2357031), (27, 785677), (149, 142371), (447, 47457), (1341, 15819), (4023, 5273)]