20539995

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 40974336

約数和(自身を除く): 20434341

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 37, 51, 85, 105, 111, 119, 185, 255, 259, 311, 357, 555, 595, 629, 777, 933, 1295, 1555, 1785, 1887, 2177, 3145, 3885, 4403, 4665, 5287, 6531, 9435, 10885, 11507, 13209, 15861, 22015, 26435, 32655, 34521, 37009, 57535, 66045, 79305, 80549, 111027, 172605, 185045, 195619, 241647, 402745, 555135, 586857, 978095, 1208235, 1369333, 2934285, 4107999, 6846665, 20539995]

約数ペア:

[(1, 20539995), (3, 6846665), (5, 4107999), (7, 2934285), (15, 1369333), (17, 1208235), (21, 978095), (35, 586857), (37, 555135), (51, 402745), (85, 241647), (105, 195619), (111, 185045), (119, 172605), (185, 111027), (255, 80549), (259, 79305), (311, 66045), (357, 57535), (555, 37009), (595, 34521), (629, 32655), (777, 26435), (933, 22015), (1295, 15861), (1555, 13209), (1785, 11507), (1887, 10885), (2177, 9435), (3145, 6531), (3885, 5287), (4403, 4665)]