81691851

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1\times {\mathrm{317}}^1$

素因数の和:531

約数の個数: 32

約数和(自身を含む): 120158208

約数和(自身を除く): 38466357

約数列:

[1, 3, 17, 31, 51, 93, 163, 317, 489, 527, 951, 1581, 2771, 5053, 5389, 8313, 9827, 15159, 16167, 29481, 51671, 85901, 155013, 167059, 257703, 501177, 878407, 1601801, 2635221, 4805403, 27230617, 81691851]

約数ペア:

[(1, 81691851), (3, 27230617), (17, 4805403), (31, 2635221), (51, 1601801), (93, 878407), (163, 501177), (317, 257703), (489, 167059), (527, 155013), (951, 85901), (1581, 51671), (2771, 29481), (5053, 16167), (5389, 15159), (8313, 9827)]