20128022525

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{3947}}^1$

素因数の和:4071

約数の個数: 72

約数和(自身を含む): 29026517184

約数和(自身を除く): 8898494659

約数列:

[1, 5, 13, 17, 25, 65, 71, 85, 169, 221, 325, 355, 425, 845, 923, 1105, 1207, 1775, 2873, 3947, 4225, 4615, 5525, 6035, 11999, 14365, 15691, 19735, 23075, 30175, 51311, 59995, 67099, 71825, 78455, 98675, 203983, 256555, 280237, 299975, 335495, 392275, 667043, 872287, 1019915, 1282775, 1401185, 1677475, 3335215, 3643081, 4361435, 4764029, 5099575, 7005925, 11339731, 16676075, 18215405, 21807175, 23820145, 47360053, 56698655, 61932377, 91077025, 119100725, 236800265, 283493275, 309661885, 805120901, 1184001325, 1548309425, 4025604505, 20128022525]

約数ペア:

[(1, 20128022525), (5, 4025604505), (13, 1548309425), (17, 1184001325), (25, 805120901), (65, 309661885), (71, 283493275), (85, 236800265), (169, 119100725), (221, 91077025), (325, 61932377), (355, 56698655), (425, 47360053), (845, 23820145), (923, 21807175), (1105, 18215405), (1207, 16676075), (1775, 11339731), (2873, 7005925), (3947, 5099575), (4225, 4764029), (4615, 4361435), (5525, 3643081), (6035, 3335215), (11999, 1677475), (14365, 1401185), (15691, 1282775), (19735, 1019915), (23075, 872287), (30175, 667043), (51311, 392275), (59995, 335495), (67099, 299975), (71825, 280237), (78455, 256555), (98675, 203983)]