21515571

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 40550400

約数和(自身を除く): 19034829

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 79, 99, 131, 189, 231, 237, 297, 393, 553, 693, 711, 869, 917, 1179, 1441, 1659, 2079, 2133, 2607, 2751, 3537, 4323, 4977, 6083, 7821, 8253, 10087, 10349, 12969, 14931, 18249, 23463, 24759, 30261, 31047, 38907, 54747, 72443, 90783, 93141, 113839, 164241, 217329, 272349, 279423, 341517, 651987, 796873, 1024551, 1955961, 2390619, 3073653, 7171857, 21515571]

約数ペア:

[(1, 21515571), (3, 7171857), (7, 3073653), (9, 2390619), (11, 1955961), (21, 1024551), (27, 796873), (33, 651987), (63, 341517), (77, 279423), (79, 272349), (99, 217329), (131, 164241), (189, 113839), (231, 93141), (237, 90783), (297, 72443), (393, 54747), (553, 38907), (693, 31047), (711, 30261), (869, 24759), (917, 23463), (1179, 18249), (1441, 14931), (1659, 12969), (2079, 10349), (2133, 10087), (2607, 8253), (2751, 7821), (3537, 6083), (4323, 4977)]