81681392

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{392699}}^1$

素因数の和:392720

約数の個数: 20

約数和(自身を含む): 170431800

約数和(自身を除く): 88750408

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 392699, 785398, 1570796, 3141592, 5105087, 6283184, 10210174, 20420348, 40840696, 81681392]

約数ペア:

[(1, 81681392), (2, 40840696), (4, 20420348), (8, 10210174), (13, 6283184), (16, 5105087), (26, 3141592), (52, 1570796), (104, 785398), (208, 392699)]