21678145

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{433}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 8319935

約数列:

[1, 5, 17, 19, 31, 85, 95, 155, 323, 433, 527, 589, 1615, 2165, 2635, 2945, 7361, 8227, 10013, 13423, 36805, 41135, 50065, 67115, 139859, 228191, 255037, 699295, 1140955, 1275185, 4335629, 21678145]

約数ペア:

[(1, 21678145), (5, 4335629), (17, 1275185), (19, 1140955), (31, 699295), (85, 255037), (95, 228191), (155, 139859), (323, 67115), (433, 50065), (527, 41135), (589, 36805), (1615, 13423), (2165, 10013), (2635, 8227), (2945, 7361)]