261119375

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1999}}^1$

素因数の和:2049

約数の個数: 40

約数和(自身を含む): 374880000

約数和(自身を除く): 113760625

約数列:

[1, 5, 11, 19, 25, 55, 95, 125, 209, 275, 475, 625, 1045, 1375, 1999, 2375, 5225, 6875, 9995, 11875, 21989, 26125, 37981, 49975, 109945, 130625, 189905, 249875, 417791, 549725, 949525, 1249375, 2088955, 2748625, 4747625, 10444775, 13743125, 23738125, 52223875, 261119375]

約数ペア:

[(1, 261119375), (5, 52223875), (11, 23738125), (19, 13743125), (25, 10444775), (55, 4747625), (95, 2748625), (125, 2088955), (209, 1249375), (275, 949525), (475, 549725), (625, 417791), (1045, 249875), (1375, 189905), (1999, 130625), (2375, 109945), (5225, 49975), (6875, 37981), (9995, 26125), (11875, 21989)]