20781500520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{86981}}^1$

素因数の和:87187

約数の個数: 128

約数和(自身を含む): 68388727680

約数和(自身を除く): 47607227160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 110, 120, 132, 165, 181, 220, 264, 330, 362, 440, 543, 660, 724, 905, 1086, 1320, 1448, 1810, 1991, 2172, 2715, 3620, 3982, 4344, 5430, 5973, 7240, 7964, 9955, 10860, 11946, 15928, 19910, 21720, 23892, 29865, 39820, 47784, 59730, 79640, 86981, 119460, 173962, 238920, 260943, 347924, 434905, 521886, 695848, 869810, 956791, 1043772, 1304715, 1739620, 1913582, 2087544, 2609430, 2870373, 3479240, 3827164, 4783955, 5218860, 5740746, 7654328, 9567910, 10437720, 11481492, 14351865, 15743561, 19135820, 22962984, 28703730, 31487122, 38271640, 47230683, 57407460, 62974244, 78717805, 94461366, 114814920, 125948488, 157435610, 173179171, 188922732, 236153415, 314871220, 346358342, 377845464, 472306830, 519537513, 629742440, 692716684, 865895855, 944613660, 1039075026, 1385433368, 1731791710, 1889227320, 2078150052, 2597687565, 3463583420, 4156300104, 5195375130, 6927166840, 10390750260, 20781500520]

約数ペア:

[(1, 20781500520), (2, 10390750260), (3, 6927166840), (4, 5195375130), (5, 4156300104), (6, 3463583420), (8, 2597687565), (10, 2078150052), (11, 1889227320), (12, 1731791710), (15, 1385433368), (20, 1039075026), (22, 944613660), (24, 865895855), (30, 692716684), (33, 629742440), (40, 519537513), (44, 472306830), (55, 377845464), (60, 346358342), (66, 314871220), (88, 236153415), (110, 188922732), (120, 173179171), (132, 157435610), (165, 125948488), (181, 114814920), (220, 94461366), (264, 78717805), (330, 62974244), (362, 57407460), (440, 47230683), (543, 38271640), (660, 31487122), (724, 28703730), (905, 22962984), (1086, 19135820), (1320, 15743561), (1448, 14351865), (1810, 11481492), (1991, 10437720), (2172, 9567910), (2715, 7654328), (3620, 5740746), (3982, 5218860), (4344, 4783955), (5430, 3827164), (5973, 3479240), (7240, 2870373), (7964, 2609430), (9955, 2087544), (10860, 1913582), (11946, 1739620), (15928, 1304715), (19910, 1043772), (21720, 956791), (23892, 869810), (29865, 695848), (39820, 521886), (47784, 434905), (59730, 347924), (79640, 260943), (86981, 238920), (119460, 173962)]