81722781

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1019}}^1$

素因数の和:1118

約数の個数: 48

約数和(自身を含む): 144268800

約数和(自身を除く): 62546019

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 67, 133, 171, 201, 399, 469, 603, 1019, 1197, 1273, 1407, 3057, 3819, 4221, 7133, 8911, 9171, 11457, 19361, 21399, 26733, 58083, 64197, 68273, 80199, 135527, 174249, 204819, 406581, 477911, 614457, 1219743, 1297187, 1433733, 3891561, 4301199, 9080309, 11674683, 27240927, 81722781]

約数ペア:

[(1, 81722781), (3, 27240927), (7, 11674683), (9, 9080309), (19, 4301199), (21, 3891561), (57, 1433733), (63, 1297187), (67, 1219743), (133, 614457), (171, 477911), (201, 406581), (399, 204819), (469, 174249), (603, 135527), (1019, 80199), (1197, 68273), (1273, 64197), (1407, 58083), (3057, 26733), (3819, 21399), (4221, 19361), (7133, 11457), (8911, 9171)]