20781101439

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1553}}^1\times {\mathrm{1597}}^1$

素因数の和:3189

約数の個数: 72

約数和(自身を含む): 36802387440

約数和(自身を除く): 16021286001

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 1553, 1597, 2793, 4659, 4791, 8379, 10871, 11179, 13977, 14373, 29507, 30343, 32613, 33537, 76097, 78253, 88521, 91029, 97839, 100611, 206549, 212401, 228291, 234759, 265563, 273087, 619647, 637203, 684873, 704277, 1445843, 1486807, 1858941, 1911609, 2480141, 4337529, 4460421, 7440423, 13012587, 13381263, 17360987, 22321269, 47122679, 52082961, 121526909, 141368037, 156248883, 329858753, 364580727, 424104111, 989576259, 1093742181, 2309011271, 2968728777, 6927033813, 20781101439]

約数ペア:

[(1, 20781101439), (3, 6927033813), (7, 2968728777), (9, 2309011271), (19, 1093742181), (21, 989576259), (49, 424104111), (57, 364580727), (63, 329858753), (133, 156248883), (147, 141368037), (171, 121526909), (399, 52082961), (441, 47122679), (931, 22321269), (1197, 17360987), (1553, 13381263), (1597, 13012587), (2793, 7440423), (4659, 4460421), (4791, 4337529), (8379, 2480141), (10871, 1911609), (11179, 1858941), (13977, 1486807), (14373, 1445843), (29507, 704277), (30343, 684873), (32613, 637203), (33537, 619647), (76097, 273087), (78253, 265563), (88521, 234759), (91029, 228291), (97839, 212401), (100611, 206549)]