21420567

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{14783}}^1$

素因数の和:14819

約数の個数: 24

約数和(自身を含む): 36900864

約数和(自身を除く): 15480297

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 161, 207, 483, 1449, 14783, 44349, 103481, 133047, 310443, 340009, 931329, 1020027, 2380063, 3060081, 7140189, 21420567]

約数ペア:

[(1, 21420567), (3, 7140189), (7, 3060081), (9, 2380063), (21, 1020027), (23, 931329), (63, 340009), (69, 310443), (161, 133047), (207, 103481), (483, 44349), (1449, 14783)]