639844555

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^3\times {\mathrm{61}}^2$

素因数の和:185

約数の個数: 48

約数和(自身を含む): 947868480

約数和(自身を除く): 308023925

約数列:

[1, 5, 7, 17, 35, 61, 85, 119, 289, 305, 427, 595, 1037, 1445, 2023, 2135, 3721, 4913, 5185, 7259, 10115, 17629, 18605, 24565, 26047, 34391, 36295, 63257, 88145, 123403, 130235, 171955, 299693, 316285, 442799, 617015, 1075369, 1498465, 2097851, 2213995, 5376845, 7527583, 10489255, 18281273, 37637915, 91406365, 127968911, 639844555]

約数ペア:

[(1, 639844555), (5, 127968911), (7, 91406365), (17, 37637915), (35, 18281273), (61, 10489255), (85, 7527583), (119, 5376845), (289, 2213995), (305, 2097851), (427, 1498465), (595, 1075369), (1037, 617015), (1445, 442799), (2023, 316285), (2135, 299693), (3721, 171955), (4913, 130235), (5185, 123403), (7259, 88145), (10115, 63257), (17629, 36295), (18605, 34391), (24565, 26047)]