81498040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156727}}^1$

素因数の和:156751

約数の個数: 32

約数和(自身を含む): 197477280

約数和(自身を除く): 115979240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156727, 313454, 626908, 783635, 1253816, 1567270, 2037451, 3134540, 4074902, 6269080, 8149804, 10187255, 16299608, 20374510, 40749020, 81498040]

約数ペア:

[(1, 81498040), (2, 40749020), (4, 20374510), (5, 16299608), (8, 10187255), (10, 8149804), (13, 6269080), (20, 4074902), (26, 3134540), (40, 2037451), (52, 1567270), (65, 1253816), (104, 783635), (130, 626908), (260, 313454), (520, 156727)]