81678025

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 125603072

約数和(自身を除く): 43925047

約数列:

[1, 5, 11, 13, 25, 31, 55, 65, 67, 121, 143, 155, 275, 325, 335, 341, 403, 605, 715, 737, 775, 871, 1573, 1675, 1705, 2015, 2077, 3025, 3575, 3685, 3751, 4355, 4433, 7865, 8107, 8525, 9581, 10075, 10385, 18425, 18755, 21775, 22165, 22847, 27001, 39325, 40535, 47905, 48763, 51925, 93775, 105391, 110825, 114235, 135005, 202675, 239525, 243815, 251317, 297011, 526955, 571175, 675025, 1219075, 1256585, 1485055, 2634775, 3267121, 6282925, 7425275, 16335605, 81678025]

約数ペア:

[(1, 81678025), (5, 16335605), (11, 7425275), (13, 6282925), (25, 3267121), (31, 2634775), (55, 1485055), (65, 1256585), (67, 1219075), (121, 675025), (143, 571175), (155, 526955), (275, 297011), (325, 251317), (335, 243815), (341, 239525), (403, 202675), (605, 135005), (715, 114235), (737, 110825), (775, 105391), (871, 93775), (1573, 51925), (1675, 48763), (1705, 47905), (2015, 40535), (2077, 39325), (3025, 27001), (3575, 22847), (3685, 22165), (3751, 21775), (4355, 18755), (4433, 18425), (7865, 10385), (8107, 10075), (8525, 9581)]