81379792

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{391249}}^1$

素因数の和:391270

約数の個数: 20

約数和(自身を含む): 169802500

約数和(自身を除く): 88422708

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 391249, 782498, 1564996, 3129992, 5086237, 6259984, 10172474, 20344948, 40689896, 81379792]

約数ペア:

[(1, 81379792), (2, 40689896), (4, 20344948), (8, 10172474), (13, 6259984), (16, 5086237), (26, 3129992), (52, 1564996), (104, 782498), (208, 391249)]