21352257

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 34819200

約数和(自身を除く): 13466943

約数列:

[1, 3, 9, 19, 23, 57, 61, 69, 89, 171, 183, 207, 267, 437, 549, 801, 1159, 1311, 1403, 1691, 2047, 3477, 3933, 4209, 5073, 5429, 6141, 10431, 12627, 15219, 16287, 18423, 26657, 38893, 48861, 79971, 103151, 116679, 124867, 239913, 309453, 350037, 374601, 928359, 1123803, 2372473, 7117419, 21352257]

約数ペア:

[(1, 21352257), (3, 7117419), (9, 2372473), (19, 1123803), (23, 928359), (57, 374601), (61, 350037), (69, 309453), (89, 239913), (171, 124867), (183, 116679), (207, 103151), (267, 79971), (437, 48861), (549, 38893), (801, 26657), (1159, 18423), (1311, 16287), (1403, 15219), (1691, 12627), (2047, 10431), (3477, 6141), (3933, 5429), (4209, 5073)]