81318375

素因数分解:

$3^2\times 5^3\times {\mathrm{41}}^2\times {\mathrm{43}}^1$

素因数の和:146

約数の個数: 72

約数和(自身を含む): 153746736

約数和(自身を除く): 72428361

約数列:

[1, 3, 5, 9, 15, 25, 41, 43, 45, 75, 123, 125, 129, 205, 215, 225, 369, 375, 387, 615, 645, 1025, 1075, 1125, 1681, 1763, 1845, 1935, 3075, 3225, 5043, 5125, 5289, 5375, 8405, 8815, 9225, 9675, 15129, 15375, 15867, 16125, 25215, 26445, 42025, 44075, 46125, 48375, 72283, 75645, 79335, 126075, 132225, 210125, 216849, 220375, 361415, 378225, 396675, 630375, 650547, 661125, 1084245, 1807075, 1891125, 1983375, 3252735, 5421225, 9035375, 16263675, 27106125, 81318375]

約数ペア:

[(1, 81318375), (3, 27106125), (5, 16263675), (9, 9035375), (15, 5421225), (25, 3252735), (41, 1983375), (43, 1891125), (45, 1807075), (75, 1084245), (123, 661125), (125, 650547), (129, 630375), (205, 396675), (215, 378225), (225, 361415), (369, 220375), (375, 216849), (387, 210125), (615, 132225), (645, 126075), (1025, 79335), (1075, 75645), (1125, 72283), (1681, 48375), (1763, 46125), (1845, 44075), (1935, 42025), (3075, 26445), (3225, 25215), (5043, 16125), (5125, 15867), (5289, 15375), (5375, 15129), (8405, 9675), (8815, 9225)]