81480880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78347}}^1$

素因数の和:78373

約数の個数: 40

約数和(自身を含む): 204018192

約数和(自身を除く): 122537312

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78347, 156694, 313388, 391735, 626776, 783470, 1018511, 1253552, 1566940, 2037022, 3133880, 4074044, 5092555, 6267760, 8148088, 10185110, 16296176, 20370220, 40740440, 81480880]

約数ペア:

[(1, 81480880), (2, 40740440), (4, 20370220), (5, 16296176), (8, 10185110), (10, 8148088), (13, 6267760), (16, 5092555), (20, 4074044), (26, 3133880), (40, 2037022), (52, 1566940), (65, 1253552), (80, 1018511), (104, 783470), (130, 626776), (208, 391735), (260, 313388), (520, 156694), (1040, 78347)]