21302445

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{601}}^1$

素因数の和:765

約数の個数: 32

約数和(自身を含む): 36408960

約数和(自身を除く): 15106515

約数列:

[1, 3, 5, 15, 17, 51, 85, 139, 255, 417, 601, 695, 1803, 2085, 2363, 3005, 7089, 9015, 10217, 11815, 30651, 35445, 51085, 83539, 153255, 250617, 417695, 1253085, 1420163, 4260489, 7100815, 21302445]

約数ペア:

[(1, 21302445), (3, 7100815), (5, 4260489), (15, 1420163), (17, 1253085), (51, 417695), (85, 250617), (139, 153255), (255, 83539), (417, 51085), (601, 35445), (695, 30651), (1803, 11815), (2085, 10217), (2363, 9015), (3005, 7089)]