21157345

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12409}}^1$

素因数の和:12456

約数の個数: 16

約数和(自身を含む): 28592640

約数和(自身を除く): 7435295

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12409, 62045, 136499, 384679, 682495, 1923395, 4231469, 21157345]

約数ペア:

[(1, 21157345), (5, 4231469), (11, 1923395), (31, 682495), (55, 384679), (155, 136499), (341, 62045), (1705, 12409)]