21179871

素因数分解:

$3^2\times {\mathrm{61}}^1\times {\mathrm{173}}^1\times {\mathrm{223}}^1$

素因数の和:463

約数の個数: 24

約数和(自身を含む): 31414656

約数和(自身を除く): 10234785

約数列:

[1, 3, 9, 61, 173, 183, 223, 519, 549, 669, 1557, 2007, 10553, 13603, 31659, 38579, 40809, 94977, 115737, 122427, 347211, 2353319, 7059957, 21179871]

約数ペア:

[(1, 21179871), (3, 7059957), (9, 2353319), (61, 347211), (173, 122427), (183, 115737), (223, 94977), (519, 40809), (549, 38579), (669, 31659), (1557, 13603), (2007, 10553)]