81881540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10159}}^1$

素因数の和:10212

約数の個数: 48

約数和(自身を含む): 191170560

約数和(自身を除く): 109289020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 4030, 8060, 10159, 20318, 40636, 50795, 101590, 132067, 203180, 264134, 314929, 528268, 629858, 660335, 1259716, 1320670, 1574645, 2641340, 3149290, 4094077, 6298580, 8188154, 16376308, 20470385, 40940770, 81881540]

約数ペア:

[(1, 81881540), (2, 40940770), (4, 20470385), (5, 16376308), (10, 8188154), (13, 6298580), (20, 4094077), (26, 3149290), (31, 2641340), (52, 1574645), (62, 1320670), (65, 1259716), (124, 660335), (130, 629858), (155, 528268), (260, 314929), (310, 264134), (403, 203180), (620, 132067), (806, 101590), (1612, 50795), (2015, 40636), (4030, 20318), (8060, 10159)]