172991780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:206

約数の個数: 96

約数和(自身を含む): 409436160

約数和(自身を除く): 236444380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 127, 130, 155, 169, 254, 260, 310, 338, 403, 508, 620, 635, 676, 806, 845, 1270, 1612, 1651, 1690, 2015, 2197, 2540, 3302, 3380, 3937, 4030, 4394, 5239, 6604, 7874, 8060, 8255, 8788, 10478, 10985, 15748, 16510, 19685, 20956, 21463, 21970, 26195, 33020, 39370, 42926, 43940, 51181, 52390, 68107, 78740, 85852, 102362, 104780, 107315, 136214, 204724, 214630, 255905, 272428, 279019, 340535, 429260, 511810, 558038, 665353, 681070, 1023620, 1116076, 1330706, 1362140, 1395095, 2661412, 2790190, 3326765, 5580380, 6653530, 8649589, 13307060, 17299178, 34598356, 43247945, 86495890, 172991780]

約数ペア:

[(1, 172991780), (2, 86495890), (4, 43247945), (5, 34598356), (10, 17299178), (13, 13307060), (20, 8649589), (26, 6653530), (31, 5580380), (52, 3326765), (62, 2790190), (65, 2661412), (124, 1395095), (127, 1362140), (130, 1330706), (155, 1116076), (169, 1023620), (254, 681070), (260, 665353), (310, 558038), (338, 511810), (403, 429260), (508, 340535), (620, 279019), (635, 272428), (676, 255905), (806, 214630), (845, 204724), (1270, 136214), (1612, 107315), (1651, 104780), (1690, 102362), (2015, 85852), (2197, 78740), (2540, 68107), (3302, 52390), (3380, 51181), (3937, 43940), (4030, 42926), (4394, 39370), (5239, 33020), (6604, 26195), (7874, 21970), (8060, 21463), (8255, 20956), (8788, 19685), (10478, 16510), (10985, 15748)]