28138677

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{647}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 45619200

約数和(自身を除く): 17480523

約数列:

[1, 3, 7, 19, 21, 57, 109, 133, 327, 399, 647, 763, 1941, 2071, 2289, 4529, 6213, 12293, 13587, 14497, 36879, 43491, 70523, 86051, 211569, 258153, 493661, 1339937, 1480983, 4019811, 9379559, 28138677]

約数ペア:

[(1, 28138677), (3, 9379559), (7, 4019811), (19, 1480983), (21, 1339937), (57, 493661), (109, 258153), (133, 211569), (327, 86051), (399, 70523), (647, 43491), (763, 36879), (1941, 14497), (2071, 13587), (2289, 12293), (4529, 6213)]