18636475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{401}}^1$

素因数の和:448

約数の個数: 36

約数和(自身を含む): 27366552

約数和(自身を除く): 8730077

約数列:

[1, 5, 11, 13, 25, 55, 65, 143, 169, 275, 325, 401, 715, 845, 1859, 2005, 3575, 4225, 4411, 5213, 9295, 10025, 22055, 26065, 46475, 57343, 67769, 110275, 130325, 286715, 338845, 745459, 1433575, 1694225, 3727295, 18636475]

約数ペア:

[(1, 18636475), (5, 3727295), (11, 1694225), (13, 1433575), (25, 745459), (55, 338845), (65, 286715), (143, 130325), (169, 110275), (275, 67769), (325, 57343), (401, 46475), (715, 26065), (845, 22055), (1859, 10025), (2005, 9295), (3575, 5213), (4225, 4411)]