31061979

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 51760800

約数和(自身を除く): 20698821

約数列:

[1, 3, 9, 13, 19, 39, 57, 89, 117, 157, 171, 247, 267, 471, 741, 801, 1157, 1413, 1691, 2041, 2223, 2983, 3471, 5073, 6123, 8949, 10413, 13973, 15219, 18369, 21983, 26847, 38779, 41919, 65949, 116337, 125757, 181649, 197847, 265487, 349011, 544947, 796461, 1634841, 2389383, 3451331, 10353993, 31061979]

約数ペア:

[(1, 31061979), (3, 10353993), (9, 3451331), (13, 2389383), (19, 1634841), (39, 796461), (57, 544947), (89, 349011), (117, 265487), (157, 197847), (171, 181649), (247, 125757), (267, 116337), (471, 65949), (741, 41919), (801, 38779), (1157, 26847), (1413, 21983), (1691, 18369), (2041, 15219), (2223, 13973), (2983, 10413), (3471, 8949), (5073, 6123)]