81405500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1$

素因数の和:109

約数の個数: 144

約数和(自身を含む): 209690208

約数和(自身を除く): 128284708

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 41, 44, 50, 55, 76, 82, 95, 100, 110, 125, 164, 190, 205, 209, 220, 250, 275, 361, 380, 410, 418, 451, 475, 500, 550, 722, 779, 820, 836, 902, 950, 1025, 1045, 1100, 1375, 1444, 1558, 1804, 1805, 1900, 2050, 2090, 2255, 2375, 2750, 3116, 3610, 3895, 3971, 4100, 4180, 4510, 4750, 5125, 5225, 5500, 7220, 7790, 7942, 8569, 9020, 9025, 9500, 10250, 10450, 11275, 14801, 15580, 15884, 17138, 18050, 19475, 19855, 20500, 20900, 22550, 26125, 29602, 34276, 36100, 38950, 39710, 42845, 45100, 45125, 52250, 56375, 59204, 74005, 77900, 79420, 85690, 90250, 97375, 99275, 104500, 112750, 148010, 162811, 171380, 180500, 194750, 198550, 214225, 225500, 296020, 325622, 370025, 389500, 397100, 428450, 496375, 651244, 740050, 814055, 856900, 992750, 1071125, 1480100, 1628110, 1850125, 1985500, 2142250, 3256220, 3700250, 4070275, 4284500, 7400500, 8140550, 16281100, 20351375, 40702750, 81405500]

約数ペア:

[(1, 81405500), (2, 40702750), (4, 20351375), (5, 16281100), (10, 8140550), (11, 7400500), (19, 4284500), (20, 4070275), (22, 3700250), (25, 3256220), (38, 2142250), (41, 1985500), (44, 1850125), (50, 1628110), (55, 1480100), (76, 1071125), (82, 992750), (95, 856900), (100, 814055), (110, 740050), (125, 651244), (164, 496375), (190, 428450), (205, 397100), (209, 389500), (220, 370025), (250, 325622), (275, 296020), (361, 225500), (380, 214225), (410, 198550), (418, 194750), (451, 180500), (475, 171380), (500, 162811), (550, 148010), (722, 112750), (779, 104500), (820, 99275), (836, 97375), (902, 90250), (950, 85690), (1025, 79420), (1045, 77900), (1100, 74005), (1375, 59204), (1444, 56375), (1558, 52250), (1804, 45125), (1805, 45100), (1900, 42845), (2050, 39710), (2090, 38950), (2255, 36100), (2375, 34276), (2750, 29602), (3116, 26125), (3610, 22550), (3895, 20900), (3971, 20500), (4100, 19855), (4180, 19475), (4510, 18050), (4750, 17138), (5125, 15884), (5225, 15580), (5500, 14801), (7220, 11275), (7790, 10450), (7942, 10250), (8569, 9500), (9020, 9025)]