81127280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78007}}^1$

素因数の和:78033

約数の個数: 40

約数和(自身を含む): 203132832

約数和(自身を除く): 122005552

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78007, 156014, 312028, 390035, 624056, 780070, 1014091, 1248112, 1560140, 2028182, 3120280, 4056364, 5070455, 6240560, 8112728, 10140910, 16225456, 20281820, 40563640, 81127280]

約数ペア:

[(1, 81127280), (2, 40563640), (4, 20281820), (5, 16225456), (8, 10140910), (10, 8112728), (13, 6240560), (16, 5070455), (20, 4056364), (26, 3120280), (40, 2028182), (52, 1560140), (65, 1248112), (80, 1014091), (104, 780070), (130, 624056), (208, 390035), (260, 312028), (520, 156014), (1040, 78007)]