21487221

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{4943}}^1$

素因数の和:4982

約数の個数: 32

約数和(自身を含む): 37969920

約数和(自身を除く): 16482699

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 161, 189, 207, 483, 621, 1449, 4347, 4943, 14829, 34601, 44487, 103803, 113689, 133461, 311409, 341067, 795823, 934227, 1023201, 2387469, 3069603, 7162407, 21487221]

約数ペア:

[(1, 21487221), (3, 7162407), (7, 3069603), (9, 2387469), (21, 1023201), (23, 934227), (27, 795823), (63, 341067), (69, 311409), (161, 133461), (189, 113689), (207, 103803), (483, 44487), (621, 34601), (1449, 14829), (4347, 4943)]