21441560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1049}}^1$

素因数の和:1140

約数の個数: 64

約数和(自身を含む): 55944000

約数和(自身を除く): 34502440

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, 1022, 1049, 1460, 2044, 2098, 2555, 2920, 4088, 4196, 5110, 5245, 7343, 8392, 10220, 10490, 14686, 20440, 20980, 29372, 36715, 41960, 58744, 73430, 76577, 146860, 153154, 293720, 306308, 382885, 536039, 612616, 765770, 1072078, 1531540, 2144156, 2680195, 3063080, 4288312, 5360390, 10720780, 21441560]

約数ペア:

[(1, 21441560), (2, 10720780), (4, 5360390), (5, 4288312), (7, 3063080), (8, 2680195), (10, 2144156), (14, 1531540), (20, 1072078), (28, 765770), (35, 612616), (40, 536039), (56, 382885), (70, 306308), (73, 293720), (140, 153154), (146, 146860), (280, 76577), (292, 73430), (365, 58744), (511, 41960), (584, 36715), (730, 29372), (1022, 20980), (1049, 20440), (1460, 14686), (2044, 10490), (2098, 10220), (2555, 8392), (2920, 7343), (4088, 5245), (4196, 5110)]