208520975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{347}}^1$

素因数の和:456

約数の個数: 36

約数和(自身を含む): 285903576

約数和(自身を除く): 77382601

約数列:

[1, 5, 13, 25, 43, 65, 215, 325, 347, 559, 1075, 1735, 1849, 2795, 4511, 8675, 9245, 13975, 14921, 22555, 24037, 46225, 74605, 112775, 120185, 193973, 373025, 600925, 641603, 969865, 3208015, 4849325, 8340839, 16040075, 41704195, 208520975]

約数ペア:

[(1, 208520975), (5, 41704195), (13, 16040075), (25, 8340839), (43, 4849325), (65, 3208015), (215, 969865), (325, 641603), (347, 600925), (559, 373025), (1075, 193973), (1735, 120185), (1849, 112775), (2795, 74605), (4511, 46225), (8675, 24037), (9245, 22555), (13975, 14921)]