18915325

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1$

素因数の和:95

約数の個数: 54

約数和(自身を含む): 28671342

約数和(自身を除く): 9756017

約数列:

[1, 5, 11, 13, 25, 37, 55, 65, 121, 143, 169, 185, 275, 325, 407, 481, 605, 715, 845, 925, 1573, 1859, 2035, 2405, 3025, 3575, 4225, 4477, 5291, 6253, 7865, 9295, 10175, 12025, 20449, 22385, 26455, 31265, 39325, 46475, 58201, 68783, 102245, 111925, 132275, 156325, 291005, 343915, 511225, 756613, 1455025, 1719575, 3783065, 18915325]

約数ペア:

[(1, 18915325), (5, 3783065), (11, 1719575), (13, 1455025), (25, 756613), (37, 511225), (55, 343915), (65, 291005), (121, 156325), (143, 132275), (169, 111925), (185, 102245), (275, 68783), (325, 58201), (407, 46475), (481, 39325), (605, 31265), (715, 26455), (845, 22385), (925, 20449), (1573, 12025), (1859, 10175), (2035, 9295), (2405, 7865), (3025, 6253), (3575, 5291), (4225, 4477)]