20781896

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{2909}}^1$

素因数の和:2981

約数の個数: 32

約数和(自身を含む): 41904000

約数和(自身を除く): 21122104

約数列:

[1, 2, 4, 8, 19, 38, 47, 76, 94, 152, 188, 376, 893, 1786, 2909, 3572, 5818, 7144, 11636, 23272, 55271, 110542, 136723, 221084, 273446, 442168, 546892, 1093784, 2597737, 5195474, 10390948, 20781896]

約数ペア:

[(1, 20781896), (2, 10390948), (4, 5195474), (8, 2597737), (19, 1093784), (38, 546892), (47, 442168), (76, 273446), (94, 221084), (152, 136723), (188, 110542), (376, 55271), (893, 23272), (1786, 11636), (2909, 7144), (3572, 5818)]