21008680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{359}}^1$

素因数の和:407

約数の個数: 128

約数和(自身を含む): 62208000

約数和(自身を除く): 41199320

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 19, 20, 22, 28, 35, 38, 40, 44, 55, 56, 70, 76, 77, 88, 95, 110, 133, 140, 152, 154, 190, 209, 220, 266, 280, 308, 359, 380, 385, 418, 440, 532, 616, 665, 718, 760, 770, 836, 1045, 1064, 1330, 1436, 1463, 1540, 1672, 1795, 2090, 2513, 2660, 2872, 2926, 3080, 3590, 3949, 4180, 5026, 5320, 5852, 6821, 7180, 7315, 7898, 8360, 10052, 11704, 12565, 13642, 14360, 14630, 15796, 19745, 20104, 25130, 27284, 27643, 29260, 31592, 34105, 39490, 47747, 50260, 54568, 55286, 58520, 68210, 75031, 78980, 95494, 100520, 110572, 136420, 138215, 150062, 157960, 190988, 221144, 238735, 272840, 276430, 300124, 375155, 381976, 477470, 525217, 552860, 600248, 750310, 954940, 1050434, 1105720, 1500620, 1909880, 2100868, 2626085, 3001240, 4201736, 5252170, 10504340, 21008680]

約数ペア:

[(1, 21008680), (2, 10504340), (4, 5252170), (5, 4201736), (7, 3001240), (8, 2626085), (10, 2100868), (11, 1909880), (14, 1500620), (19, 1105720), (20, 1050434), (22, 954940), (28, 750310), (35, 600248), (38, 552860), (40, 525217), (44, 477470), (55, 381976), (56, 375155), (70, 300124), (76, 276430), (77, 272840), (88, 238735), (95, 221144), (110, 190988), (133, 157960), (140, 150062), (152, 138215), (154, 136420), (190, 110572), (209, 100520), (220, 95494), (266, 78980), (280, 75031), (308, 68210), (359, 58520), (380, 55286), (385, 54568), (418, 50260), (440, 47747), (532, 39490), (616, 34105), (665, 31592), (718, 29260), (760, 27643), (770, 27284), (836, 25130), (1045, 20104), (1064, 19745), (1330, 15796), (1436, 14630), (1463, 14360), (1540, 13642), (1672, 12565), (1795, 11704), (2090, 10052), (2513, 8360), (2660, 7898), (2872, 7315), (2926, 7180), (3080, 6821), (3590, 5852), (3949, 5320), (4180, 5026)]