81250325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^2\times {\mathrm{89}}^1$

素因数の和:218

約数の個数: 36

約数和(自身を含む): 111828780

約数和(自身を除く): 30578455

約数列:

[1, 5, 13, 25, 53, 65, 89, 265, 325, 445, 689, 1157, 1325, 2225, 2809, 3445, 4717, 5785, 14045, 17225, 23585, 28925, 36517, 61321, 70225, 117925, 182585, 250001, 306605, 912925, 1250005, 1533025, 3250013, 6250025, 16250065, 81250325]

約数ペア:

[(1, 81250325), (5, 16250065), (13, 6250025), (25, 3250013), (53, 1533025), (65, 1250005), (89, 912925), (265, 306605), (325, 250001), (445, 182585), (689, 117925), (1157, 70225), (1325, 61321), (2225, 36517), (2809, 28925), (3445, 23585), (4717, 17225), (5785, 14045)]