20671036640

素因数分解:

$2^5\times 5^1\times {\mathrm{197}}^1\times {\mathrm{655807}}^1$

素因数の和:656019

約数の個数: 48

約数和(自身を含む): 49083293952

約数和(自身を除く): 28412257312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 6304, 7880, 15760, 31520, 655807, 1311614, 2623228, 3279035, 5246456, 6558070, 10492912, 13116140, 20985824, 26232280, 52464560, 104929120, 129193979, 258387958, 516775916, 645969895, 1033551832, 1291939790, 2067103664, 2583879580, 4134207328, 5167759160, 10335518320, 20671036640]

約数ペア:

[(1, 20671036640), (2, 10335518320), (4, 5167759160), (5, 4134207328), (8, 2583879580), (10, 2067103664), (16, 1291939790), (20, 1033551832), (32, 645969895), (40, 516775916), (80, 258387958), (160, 129193979), (197, 104929120), (394, 52464560), (788, 26232280), (985, 20985824), (1576, 13116140), (1970, 10492912), (3152, 6558070), (3940, 5246456), (6304, 3279035), (7880, 2623228), (15760, 1311614), (31520, 655807)]