81981361

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 115240320

約数和(自身を除く): 33258959

約数列:

[1, 7, 11, 17, 23, 49, 77, 119, 161, 187, 253, 389, 391, 539, 833, 1127, 1309, 1771, 2723, 2737, 4279, 4301, 6613, 8947, 9163, 12397, 19061, 19159, 29953, 30107, 46291, 62629, 72743, 98417, 152099, 209671, 210749, 324037, 438403, 509201, 688919, 1064693, 1673089, 3564407, 4822433, 7452851, 11711623, 81981361]

約数ペア:

[(1, 81981361), (7, 11711623), (11, 7452851), (17, 4822433), (23, 3564407), (49, 1673089), (77, 1064693), (119, 688919), (161, 509201), (187, 438403), (253, 324037), (389, 210749), (391, 209671), (539, 152099), (833, 98417), (1127, 72743), (1309, 62629), (1771, 46291), (2723, 30107), (2737, 29953), (4279, 19159), (4301, 19061), (6613, 12397), (8947, 9163)]