21730215

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2371}}^1$

素因数の和:2439

約数の個数: 32

約数和(自身を含む): 38255616

約数和(自身を除く): 16525401

約数列:

[1, 3, 5, 13, 15, 39, 47, 65, 141, 195, 235, 611, 705, 1833, 2371, 3055, 7113, 9165, 11855, 30823, 35565, 92469, 111437, 154115, 334311, 462345, 557185, 1448681, 1671555, 4346043, 7243405, 21730215]

約数ペア:

[(1, 21730215), (3, 7243405), (5, 4346043), (13, 1671555), (15, 1448681), (39, 557185), (47, 462345), (65, 334311), (141, 154115), (195, 111437), (235, 92469), (611, 35565), (705, 30823), (1833, 11855), (2371, 9165), (3055, 7113)]