405080720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{479}}^1$

素因数の和:565

約数の個数: 120

約数和(自身を含む): 1063860480

約数和(自身を除く): 658779760

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 80, 88, 110, 124, 155, 176, 220, 248, 310, 341, 440, 479, 496, 620, 682, 880, 958, 961, 1240, 1364, 1705, 1916, 1922, 2395, 2480, 2728, 3410, 3832, 3844, 4790, 4805, 5269, 5456, 6820, 7664, 7688, 9580, 9610, 10538, 10571, 13640, 14849, 15376, 19160, 19220, 21076, 21142, 26345, 27280, 29698, 38320, 38440, 42152, 42284, 52690, 52855, 59396, 74245, 76880, 84304, 84568, 105380, 105710, 118792, 148490, 163339, 169136, 210760, 211420, 237584, 296980, 326678, 421520, 422840, 460319, 593960, 653356, 816695, 845680, 920638, 1187920, 1306712, 1633390, 1841276, 2301595, 2613424, 3266780, 3682552, 4603190, 5063509, 6533560, 7365104, 9206380, 10127018, 13067120, 18412760, 20254036, 25317545, 36825520, 40508072, 50635090, 81016144, 101270180, 202540360, 405080720]

約数ペア:

[(1, 405080720), (2, 202540360), (4, 101270180), (5, 81016144), (8, 50635090), (10, 40508072), (11, 36825520), (16, 25317545), (20, 20254036), (22, 18412760), (31, 13067120), (40, 10127018), (44, 9206380), (55, 7365104), (62, 6533560), (80, 5063509), (88, 4603190), (110, 3682552), (124, 3266780), (155, 2613424), (176, 2301595), (220, 1841276), (248, 1633390), (310, 1306712), (341, 1187920), (440, 920638), (479, 845680), (496, 816695), (620, 653356), (682, 593960), (880, 460319), (958, 422840), (961, 421520), (1240, 326678), (1364, 296980), (1705, 237584), (1916, 211420), (1922, 210760), (2395, 169136), (2480, 163339), (2728, 148490), (3410, 118792), (3832, 105710), (3844, 105380), (4790, 84568), (4805, 84304), (5269, 76880), (5456, 74245), (6820, 59396), (7664, 52855), (7688, 52690), (9580, 42284), (9610, 42152), (10538, 38440), (10571, 38320), (13640, 29698), (14849, 27280), (15376, 26345), (19160, 21142), (19220, 21076)]