21151900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:140

約数の個数: 144

約数和(自身を含む): 59496192

約数和(自身を除く): 38344292

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 41, 44, 50, 55, 67, 70, 77, 82, 100, 110, 134, 140, 154, 164, 175, 205, 220, 268, 275, 287, 308, 335, 350, 385, 410, 451, 469, 550, 574, 670, 700, 737, 770, 820, 902, 938, 1025, 1100, 1148, 1340, 1435, 1474, 1540, 1675, 1804, 1876, 1925, 2050, 2255, 2345, 2747, 2870, 2948, 3157, 3350, 3685, 3850, 4100, 4510, 4690, 5159, 5494, 5740, 6314, 6700, 7175, 7370, 7700, 9020, 9380, 10318, 10988, 11275, 11725, 12628, 13735, 14350, 14740, 15785, 18425, 19229, 20636, 22550, 23450, 25795, 27470, 28700, 30217, 31570, 36850, 38458, 45100, 46900, 51590, 54940, 60434, 63140, 68675, 73700, 76916, 78925, 96145, 103180, 120868, 128975, 137350, 151085, 157850, 192290, 211519, 257950, 274700, 302170, 315700, 384580, 423038, 480725, 515900, 604340, 755425, 846076, 961450, 1057595, 1510850, 1922900, 2115190, 3021700, 4230380, 5287975, 10575950, 21151900]

約数ペア:

[(1, 21151900), (2, 10575950), (4, 5287975), (5, 4230380), (7, 3021700), (10, 2115190), (11, 1922900), (14, 1510850), (20, 1057595), (22, 961450), (25, 846076), (28, 755425), (35, 604340), (41, 515900), (44, 480725), (50, 423038), (55, 384580), (67, 315700), (70, 302170), (77, 274700), (82, 257950), (100, 211519), (110, 192290), (134, 157850), (140, 151085), (154, 137350), (164, 128975), (175, 120868), (205, 103180), (220, 96145), (268, 78925), (275, 76916), (287, 73700), (308, 68675), (335, 63140), (350, 60434), (385, 54940), (410, 51590), (451, 46900), (469, 45100), (550, 38458), (574, 36850), (670, 31570), (700, 30217), (737, 28700), (770, 27470), (820, 25795), (902, 23450), (938, 22550), (1025, 20636), (1100, 19229), (1148, 18425), (1340, 15785), (1435, 14740), (1474, 14350), (1540, 13735), (1675, 12628), (1804, 11725), (1876, 11275), (1925, 10988), (2050, 10318), (2255, 9380), (2345, 9020), (2747, 7700), (2870, 7370), (2948, 7175), (3157, 6700), (3350, 6314), (3685, 5740), (3850, 5494), (4100, 5159), (4510, 4690)]