21326075

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{139}}^1$

素因数の和:204

約数の個数: 36

約数和(自身を含む): 29763720

約数和(自身を除く): 8437645

約数列:

[1, 5, 17, 19, 25, 85, 95, 139, 323, 361, 425, 475, 695, 1615, 1805, 2363, 2641, 3475, 6137, 8075, 9025, 11815, 13205, 30685, 44897, 50179, 59075, 66025, 153425, 224485, 250895, 853043, 1122425, 1254475, 4265215, 21326075]

約数ペア:

[(1, 21326075), (5, 4265215), (17, 1254475), (19, 1122425), (25, 853043), (85, 250895), (95, 224485), (139, 153425), (323, 66025), (361, 59075), (425, 50179), (475, 44897), (695, 30685), (1615, 13205), (1805, 11815), (2363, 9025), (2641, 8075), (3475, 6137)]