21284361

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 37749504

約数和(自身を除く): 16465143

約数列:

[1, 3, 7, 9, 21, 23, 37, 63, 69, 111, 161, 207, 259, 333, 397, 483, 777, 851, 1191, 1449, 2331, 2553, 2779, 3573, 5957, 7659, 8337, 9131, 14689, 17871, 25011, 27393, 44067, 53613, 63917, 82179, 102823, 132201, 191751, 308469, 337847, 575253, 925407, 1013541, 2364929, 3040623, 7094787, 21284361]

約数ペア:

[(1, 21284361), (3, 7094787), (7, 3040623), (9, 2364929), (21, 1013541), (23, 925407), (37, 575253), (63, 337847), (69, 308469), (111, 191751), (161, 132201), (207, 102823), (259, 82179), (333, 63917), (397, 53613), (483, 44067), (777, 27393), (851, 25011), (1191, 17871), (1449, 14689), (2331, 9131), (2553, 8337), (2779, 7659), (3573, 5957)]