81731559

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2251}}^1$

素因数の和:2300

約数の個数: 48

約数和(自身を含む): 143767680

約数和(自身を除く): 62036121

約数列:

[1, 3, 7, 13, 19, 21, 39, 49, 57, 91, 133, 147, 247, 273, 399, 637, 741, 931, 1729, 1911, 2251, 2793, 5187, 6753, 12103, 15757, 29263, 36309, 42769, 47271, 87789, 110299, 128307, 204841, 299383, 330897, 555997, 614523, 898149, 1433887, 1667991, 2095681, 3891979, 4301661, 6287043, 11675937, 27243853, 81731559]

約数ペア:

[(1, 81731559), (3, 27243853), (7, 11675937), (13, 6287043), (19, 4301661), (21, 3891979), (39, 2095681), (49, 1667991), (57, 1433887), (91, 898149), (133, 614523), (147, 555997), (247, 330897), (273, 299383), (399, 204841), (637, 128307), (741, 110299), (931, 87789), (1729, 47271), (1911, 42769), (2251, 36309), (2793, 29263), (5187, 15757), (6753, 12103)]