20216949975

素因数分解:

$3^5\times 5^2\times {\mathrm{23}}^1\times {\mathrm{257}}^1\times {\mathrm{563}}^1$

素因数の和:868

約数の個数: 144

約数和(自身を含む): 39406977792

約数和(自身を除く): 19190027817

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 81, 115, 135, 207, 225, 243, 257, 345, 405, 563, 575, 621, 675, 771, 1035, 1215, 1285, 1689, 1725, 1863, 2025, 2313, 2815, 3105, 3855, 5067, 5175, 5589, 5911, 6075, 6425, 6939, 8445, 9315, 11565, 12949, 14075, 15201, 15525, 17733, 19275, 20817, 25335, 27945, 29555, 34695, 38847, 42225, 45603, 46575, 53199, 57825, 62451, 64745, 76005, 88665, 104085, 116541, 126675, 136809, 139725, 144691, 147775, 159597, 173475, 194235, 228015, 265995, 312255, 323725, 349623, 380025, 434073, 443325, 478791, 520425, 582705, 684045, 723455, 797985, 971175, 1048869, 1140075, 1302219, 1329975, 1436373, 1561275, 1748115, 2170365, 2393955, 2913525, 3146607, 3327893, 3420225, 3617275, 3906657, 3989925, 5244345, 6511095, 7181865, 8740575, 9983679, 10851825, 11719971, 11969775, 15733035, 16639465, 19533285, 26221725, 29951037, 32555475, 35159913, 35909325, 49918395, 58599855, 78665175, 83197325, 89853111, 97666425, 149755185, 175799565, 249591975, 269559333, 292999275, 449265555, 748775925, 808677999, 878997825, 1347796665, 2246327775, 4043389995, 6738983325, 20216949975]

約数ペア:

[(1, 20216949975), (3, 6738983325), (5, 4043389995), (9, 2246327775), (15, 1347796665), (23, 878997825), (25, 808677999), (27, 748775925), (45, 449265555), (69, 292999275), (75, 269559333), (81, 249591975), (115, 175799565), (135, 149755185), (207, 97666425), (225, 89853111), (243, 83197325), (257, 78665175), (345, 58599855), (405, 49918395), (563, 35909325), (575, 35159913), (621, 32555475), (675, 29951037), (771, 26221725), (1035, 19533285), (1215, 16639465), (1285, 15733035), (1689, 11969775), (1725, 11719971), (1863, 10851825), (2025, 9983679), (2313, 8740575), (2815, 7181865), (3105, 6511095), (3855, 5244345), (5067, 3989925), (5175, 3906657), (5589, 3617275), (5911, 3420225), (6075, 3327893), (6425, 3146607), (6939, 2913525), (8445, 2393955), (9315, 2170365), (11565, 1748115), (12949, 1561275), (14075, 1436373), (15201, 1329975), (15525, 1302219), (17733, 1140075), (19275, 1048869), (20817, 971175), (25335, 797985), (27945, 723455), (29555, 684045), (34695, 582705), (38847, 520425), (42225, 478791), (45603, 443325), (46575, 434073), (53199, 380025), (57825, 349623), (62451, 323725), (64745, 312255), (76005, 265995), (88665, 228015), (104085, 194235), (116541, 173475), (126675, 159597), (136809, 147775), (139725, 144691)]