31397975

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^2\times {\mathrm{71}}^1$

素因数の和:133

約数の個数: 54

約数和(自身を含む): 48472344

約数和(自身を除く): 17074369

約数列:

[1, 5, 7, 19, 25, 35, 49, 71, 95, 133, 175, 245, 355, 361, 475, 497, 665, 931, 1225, 1349, 1775, 1805, 2485, 2527, 3325, 3479, 4655, 6745, 9025, 9443, 12425, 12635, 17395, 17689, 23275, 25631, 33725, 47215, 63175, 66101, 86975, 88445, 128155, 179417, 236075, 330505, 442225, 640775, 897085, 1255919, 1652525, 4485425, 6279595, 31397975]

約数ペア:

[(1, 31397975), (5, 6279595), (7, 4485425), (19, 1652525), (25, 1255919), (35, 897085), (49, 640775), (71, 442225), (95, 330505), (133, 236075), (175, 179417), (245, 128155), (355, 88445), (361, 86975), (475, 66101), (497, 63175), (665, 47215), (931, 33725), (1225, 25631), (1349, 23275), (1775, 17689), (1805, 17395), (2485, 12635), (2527, 12425), (3325, 9443), (3479, 9025), (4655, 6745)]