21093680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 30465520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 59, 80, 82, 109, 118, 164, 205, 218, 236, 295, 328, 410, 436, 472, 545, 590, 656, 820, 872, 944, 1090, 1180, 1640, 1744, 2180, 2360, 2419, 3280, 4360, 4469, 4720, 4838, 6431, 8720, 8938, 9676, 12095, 12862, 17876, 19352, 22345, 24190, 25724, 32155, 35752, 38704, 44690, 48380, 51448, 64310, 71504, 89380, 96760, 102896, 128620, 178760, 193520, 257240, 263671, 357520, 514480, 527342, 1054684, 1318355, 2109368, 2636710, 4218736, 5273420, 10546840, 21093680]

約数ペア:

[(1, 21093680), (2, 10546840), (4, 5273420), (5, 4218736), (8, 2636710), (10, 2109368), (16, 1318355), (20, 1054684), (40, 527342), (41, 514480), (59, 357520), (80, 263671), (82, 257240), (109, 193520), (118, 178760), (164, 128620), (205, 102896), (218, 96760), (236, 89380), (295, 71504), (328, 64310), (410, 51448), (436, 48380), (472, 44690), (545, 38704), (590, 35752), (656, 32155), (820, 25724), (872, 24190), (944, 22345), (1090, 19352), (1180, 17876), (1640, 12862), (1744, 12095), (2180, 9676), (2360, 8938), (2419, 8720), (3280, 6431), (4360, 4838), (4469, 4720)]