127517420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{1009}}^1$

素因数の和:1178

約数の個数: 48

約数和(自身を含む): 274881600

約数和(自身を除く): 147364180

約数列:

[1, 2, 4, 5, 10, 20, 71, 89, 142, 178, 284, 355, 356, 445, 710, 890, 1009, 1420, 1780, 2018, 4036, 5045, 6319, 10090, 12638, 20180, 25276, 31595, 63190, 71639, 89801, 126380, 143278, 179602, 286556, 358195, 359204, 449005, 716390, 898010, 1432780, 1796020, 6375871, 12751742, 25503484, 31879355, 63758710, 127517420]

約数ペア:

[(1, 127517420), (2, 63758710), (4, 31879355), (5, 25503484), (10, 12751742), (20, 6375871), (71, 1796020), (89, 1432780), (142, 898010), (178, 716390), (284, 449005), (355, 359204), (356, 358195), (445, 286556), (710, 179602), (890, 143278), (1009, 126380), (1420, 89801), (1780, 71639), (2018, 63190), (4036, 31595), (5045, 25276), (6319, 20180), (10090, 12638)]