21272913

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{4013}}^1$

素因数の和:4069

約数の個数: 24

約数和(自身を含む): 33396480

約数和(自身を除く): 12123567

約数列:

[1, 3, 9, 19, 31, 57, 93, 171, 279, 589, 1767, 4013, 5301, 12039, 36117, 76247, 124403, 228741, 373209, 686223, 1119627, 2363657, 7090971, 21272913]

約数ペア:

[(1, 21272913), (3, 7090971), (9, 2363657), (19, 1119627), (31, 686223), (57, 373209), (93, 228741), (171, 124403), (279, 76247), (589, 36117), (1767, 12039), (4013, 5301)]