21305505

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6427}}^1$

素因数の和:6465

約数の個数: 32

約数和(自身を含む): 38876544

約数和(自身を除く): 17571039

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6427, 19281, 32135, 83551, 96405, 109259, 250653, 327777, 417755, 546295, 1253265, 1420367, 1638885, 4261101, 7101835, 21305505]

約数ペア:

[(1, 21305505), (3, 7101835), (5, 4261101), (13, 1638885), (15, 1420367), (17, 1253265), (39, 546295), (51, 417755), (65, 327777), (85, 250653), (195, 109259), (221, 96405), (255, 83551), (663, 32135), (1105, 19281), (3315, 6427)]