20378680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{997}}^1$

素因数の和:1088

約数の個数: 64

約数和(自身を含む): 53173440

約数和(自身を除く): 32794760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 997, 1022, 1460, 1994, 2044, 2555, 2920, 3988, 4088, 4985, 5110, 6979, 7976, 9970, 10220, 13958, 19940, 20440, 27916, 34895, 39880, 55832, 69790, 72781, 139580, 145562, 279160, 291124, 363905, 509467, 582248, 727810, 1018934, 1455620, 2037868, 2547335, 2911240, 4075736, 5094670, 10189340, 20378680]

約数ペア:

[(1, 20378680), (2, 10189340), (4, 5094670), (5, 4075736), (7, 2911240), (8, 2547335), (10, 2037868), (14, 1455620), (20, 1018934), (28, 727810), (35, 582248), (40, 509467), (56, 363905), (70, 291124), (73, 279160), (140, 145562), (146, 139580), (280, 72781), (292, 69790), (365, 55832), (511, 39880), (584, 34895), (730, 27916), (997, 20440), (1022, 19940), (1460, 13958), (1994, 10220), (2044, 9970), (2555, 7976), (2920, 6979), (3988, 5110), (4088, 4985)]