81120025

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{787}}^1$

素因数の和:854

約数の個数: 48

約数和(自身を含む): 125071360

約数和(自身を除く): 43951335

約数列:

[1, 5, 7, 19, 25, 31, 35, 95, 133, 155, 175, 217, 475, 589, 665, 775, 787, 1085, 2945, 3325, 3935, 4123, 5425, 5509, 14725, 14953, 19675, 20615, 24397, 27545, 74765, 103075, 104671, 121985, 137725, 170779, 373825, 463543, 523355, 609925, 853895, 2317715, 2616775, 3244801, 4269475, 11588575, 16224005, 81120025]

約数ペア:

[(1, 81120025), (5, 16224005), (7, 11588575), (19, 4269475), (25, 3244801), (31, 2616775), (35, 2317715), (95, 853895), (133, 609925), (155, 523355), (175, 463543), (217, 373825), (475, 170779), (589, 137725), (665, 121985), (775, 104671), (787, 103075), (1085, 74765), (2945, 27545), (3325, 24397), (3935, 20615), (4123, 19675), (5425, 14953), (5509, 14725)]