21193557

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3989}}^1$

素因数の和:4033

約数の個数: 32

約数和(自身を含む): 36771840

約数和(自身を除く): 15578283

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 161, 231, 253, 483, 759, 1771, 3989, 5313, 11967, 27923, 43879, 83769, 91747, 131637, 275241, 307153, 642229, 921459, 1009217, 1926687, 3027651, 7064519, 21193557]

約数ペア:

[(1, 21193557), (3, 7064519), (7, 3027651), (11, 1926687), (21, 1009217), (23, 921459), (33, 642229), (69, 307153), (77, 275241), (161, 131637), (231, 91747), (253, 83769), (483, 43879), (759, 27923), (1771, 11967), (3989, 5313)]