21019867960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{303931}}^1$

素因数の和:303981

約数の個数: 128

約数和(自身を含む): 61272691200

約数和(自身を除く): 40252823240

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 19, 20, 26, 28, 35, 38, 40, 52, 56, 65, 70, 76, 91, 95, 104, 130, 133, 140, 152, 182, 190, 247, 260, 266, 280, 364, 380, 455, 494, 520, 532, 665, 728, 760, 910, 988, 1064, 1235, 1330, 1729, 1820, 1976, 2470, 2660, 3458, 3640, 4940, 5320, 6916, 8645, 9880, 13832, 17290, 34580, 69160, 303931, 607862, 1215724, 1519655, 2127517, 2431448, 3039310, 3951103, 4255034, 5774689, 6078620, 7902206, 8510068, 10637585, 11549378, 12157240, 15804412, 17020136, 19755515, 21275170, 23098756, 27657721, 28873445, 31608824, 39511030, 40422823, 42550340, 46197512, 55315442, 57746890, 75070957, 79022060, 80845646, 85100680, 110630884, 115493780, 138288605, 150141914, 158044120, 161691292, 202114115, 221261768, 230987560, 276577210, 300283828, 323382584, 375354785, 404228230, 525496699, 553154420, 600567656, 750709570, 808456460, 1050993398, 1106308840, 1501419140, 1616912920, 2101986796, 2627483495, 3002838280, 4203973592, 5254966990, 10509933980, 21019867960]

約数ペア:

[(1, 21019867960), (2, 10509933980), (4, 5254966990), (5, 4203973592), (7, 3002838280), (8, 2627483495), (10, 2101986796), (13, 1616912920), (14, 1501419140), (19, 1106308840), (20, 1050993398), (26, 808456460), (28, 750709570), (35, 600567656), (38, 553154420), (40, 525496699), (52, 404228230), (56, 375354785), (65, 323382584), (70, 300283828), (76, 276577210), (91, 230987560), (95, 221261768), (104, 202114115), (130, 161691292), (133, 158044120), (140, 150141914), (152, 138288605), (182, 115493780), (190, 110630884), (247, 85100680), (260, 80845646), (266, 79022060), (280, 75070957), (364, 57746890), (380, 55315442), (455, 46197512), (494, 42550340), (520, 40422823), (532, 39511030), (665, 31608824), (728, 28873445), (760, 27657721), (910, 23098756), (988, 21275170), (1064, 19755515), (1235, 17020136), (1330, 15804412), (1729, 12157240), (1820, 11549378), (1976, 10637585), (2470, 8510068), (2660, 7902206), (3458, 6078620), (3640, 5774689), (4940, 4255034), (5320, 3951103), (6916, 3039310), (8645, 2431448), (9880, 2127517), (13832, 1519655), (17290, 1215724), (34580, 607862), (69160, 303931)]