21348320

素因数分解:

$2^5\times 5^1\times 7^3\times {\mathrm{389}}^1$

素因数の和:425

約数の個数: 96

約数和(自身を含む): 58968000

約数和(自身を除く): 37619680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 343, 389, 392, 490, 560, 686, 778, 784, 980, 1120, 1372, 1556, 1568, 1715, 1945, 1960, 2723, 2744, 3112, 3430, 3890, 3920, 5446, 5488, 6224, 6860, 7780, 7840, 10892, 10976, 12448, 13615, 13720, 15560, 19061, 21784, 27230, 27440, 31120, 38122, 43568, 54460, 54880, 62240, 76244, 87136, 95305, 108920, 133427, 152488, 190610, 217840, 266854, 304976, 381220, 435680, 533708, 609952, 667135, 762440, 1067416, 1334270, 1524880, 2134832, 2668540, 3049760, 4269664, 5337080, 10674160, 21348320]

約数ペア:

[(1, 21348320), (2, 10674160), (4, 5337080), (5, 4269664), (7, 3049760), (8, 2668540), (10, 2134832), (14, 1524880), (16, 1334270), (20, 1067416), (28, 762440), (32, 667135), (35, 609952), (40, 533708), (49, 435680), (56, 381220), (70, 304976), (80, 266854), (98, 217840), (112, 190610), (140, 152488), (160, 133427), (196, 108920), (224, 95305), (245, 87136), (280, 76244), (343, 62240), (389, 54880), (392, 54460), (490, 43568), (560, 38122), (686, 31120), (778, 27440), (784, 27230), (980, 21784), (1120, 19061), (1372, 15560), (1556, 13720), (1568, 13615), (1715, 12448), (1945, 10976), (1960, 10892), (2723, 7840), (2744, 7780), (3112, 6860), (3430, 6224), (3890, 5488), (3920, 5446)]