21243145

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2399}}^1$

素因数の和:2445

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 11934455

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2399, 8855, 11995, 16793, 26389, 55177, 83965, 131945, 184723, 275885, 386239, 606947, 923615, 1931195, 3034735, 4248629, 21243145]

約数ペア:

[(1, 21243145), (5, 4248629), (7, 3034735), (11, 1931195), (23, 923615), (35, 606947), (55, 386239), (77, 275885), (115, 184723), (161, 131945), (253, 83965), (385, 55177), (805, 26389), (1265, 16793), (1771, 11995), (2399, 8855)]