21000887973

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1646741}}^1$

素因数の和:1646869

約数の個数: 24

約数和(自身を含む): 32967774840

約数和(自身を除く): 11966886867

約数列:

[1, 3, 9, 13, 39, 109, 117, 327, 981, 1417, 4251, 12753, 1646741, 4940223, 14820669, 21407633, 64222899, 179494769, 192668697, 538484307, 1615452921, 2333431997, 7000295991, 21000887973]

約数ペア:

[(1, 21000887973), (3, 7000295991), (9, 2333431997), (13, 1615452921), (39, 538484307), (109, 192668697), (117, 179494769), (327, 64222899), (981, 21407633), (1417, 14820669), (4251, 4940223), (12753, 1646741)]