21179865

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4691}}^1$

素因数の和:4749

約数の個数: 32

約数和(自身を含む): 39638016

約数和(自身を除く): 18458151

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 105, 129, 215, 301, 645, 903, 1505, 4515, 4691, 14073, 23455, 32837, 70365, 98511, 164185, 201713, 492555, 605139, 1008565, 1411991, 3025695, 4235973, 7059955, 21179865]

約数ペア:

[(1, 21179865), (3, 7059955), (5, 4235973), (7, 3025695), (15, 1411991), (21, 1008565), (35, 605139), (43, 492555), (105, 201713), (129, 164185), (215, 98511), (301, 70365), (645, 32837), (903, 23455), (1505, 14073), (4515, 4691)]