21217203

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5521}}^1$

素因数の和:5595

約数の個数: 24

約数和(自身を含む): 35605856

約数和(自身を除く): 14388653

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5521, 16563, 38647, 49689, 115941, 336781, 347823, 1010343, 2357467, 3031029, 7072401, 21217203]

約数ペア:

[(1, 21217203), (3, 7072401), (7, 3031029), (9, 2357467), (21, 1010343), (61, 347823), (63, 336781), (183, 115941), (427, 49689), (549, 38647), (1281, 16563), (3843, 5521)]