21447621

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:330

約数の個数: 36

約数和(自身を含む): 34257600

約数和(自身を除く): 12809979

約数列:

[1, 3, 9, 13, 39, 59, 117, 169, 177, 239, 507, 531, 717, 767, 1521, 2151, 2301, 3107, 6903, 9321, 9971, 14101, 27963, 29913, 40391, 42303, 89739, 121173, 126909, 183313, 363519, 549939, 1649817, 2383069, 7149207, 21447621]

約数ペア:

[(1, 21447621), (3, 7149207), (9, 2383069), (13, 1649817), (39, 549939), (59, 363519), (117, 183313), (169, 126909), (177, 121173), (239, 89739), (507, 42303), (531, 40391), (717, 29913), (767, 27963), (1521, 14101), (2151, 9971), (2301, 9321), (3107, 6903)]