21224791

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{509}}^1$

素因数の和:583

約数の個数: 24

約数和(自身を含む): 26511840

約数和(自身を除く): 5287049

約数列:

[1, 7, 23, 37, 49, 161, 259, 509, 851, 1127, 1813, 3563, 5957, 11707, 18833, 24941, 41699, 81949, 131831, 433159, 573643, 922817, 3032113, 21224791]

約数ペア:

[(1, 21224791), (7, 3032113), (23, 922817), (37, 573643), (49, 433159), (161, 131831), (259, 81949), (509, 41699), (851, 24941), (1127, 18833), (1813, 11707), (3563, 5957)]