217294465

素因数分解:

$5^1\times {\mathrm{41}}^2\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:441

約数の個数: 24

約数和(自身を含む): 270938304

約数和(自身を除く): 53643839

約数列:

[1, 5, 41, 103, 205, 251, 515, 1255, 1681, 4223, 8405, 10291, 21115, 25853, 51455, 129265, 173143, 421931, 865715, 1059973, 2109655, 5299865, 43458893, 217294465]

約数ペア:

[(1, 217294465), (5, 43458893), (41, 5299865), (103, 2109655), (205, 1059973), (251, 865715), (515, 421931), (1255, 173143), (1681, 129265), (4223, 51455), (8405, 25853), (10291, 21115)]