81037240

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{7883}}^1$

素因数の和:8151

約数の個数: 32

約数和(自身を含む): 183066480

約数和(自身を除く): 102029240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 7883, 10280, 15766, 31532, 39415, 63064, 78830, 157660, 315320, 2025931, 4051862, 8103724, 10129655, 16207448, 20259310, 40518620, 81037240]

約数ペア:

[(1, 81037240), (2, 40518620), (4, 20259310), (5, 16207448), (8, 10129655), (10, 8103724), (20, 4051862), (40, 2025931), (257, 315320), (514, 157660), (1028, 78830), (1285, 63064), (2056, 39415), (2570, 31532), (5140, 15766), (7883, 10280)]