20979448

素因数分解:

$2^3\times 7^2\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 46272600

約数和(自身を除く): 25293152

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 109, 196, 218, 392, 436, 491, 763, 872, 982, 1526, 1964, 3052, 3437, 3928, 5341, 6104, 6874, 10682, 13748, 21364, 24059, 27496, 42728, 48118, 53519, 96236, 107038, 192472, 214076, 374633, 428152, 749266, 1498532, 2622431, 2997064, 5244862, 10489724, 20979448]

約数ペア:

[(1, 20979448), (2, 10489724), (4, 5244862), (7, 2997064), (8, 2622431), (14, 1498532), (28, 749266), (49, 428152), (56, 374633), (98, 214076), (109, 192472), (196, 107038), (218, 96236), (392, 53519), (436, 48118), (491, 42728), (763, 27496), (872, 24059), (982, 21364), (1526, 13748), (1964, 10682), (3052, 6874), (3437, 6104), (3928, 5341)]