81639080

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 189559440

約数和(自身を除く): 107920360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 97, 106, 194, 212, 265, 388, 397, 424, 485, 530, 776, 794, 970, 1060, 1588, 1940, 1985, 2120, 3176, 3880, 3970, 5141, 7940, 10282, 15880, 20564, 21041, 25705, 38509, 41128, 42082, 51410, 77018, 84164, 102820, 105205, 154036, 168328, 192545, 205640, 210410, 308072, 385090, 420820, 770180, 841640, 1540360, 2040977, 4081954, 8163908, 10204885, 16327816, 20409770, 40819540, 81639080]

約数ペア:

[(1, 81639080), (2, 40819540), (4, 20409770), (5, 16327816), (8, 10204885), (10, 8163908), (20, 4081954), (40, 2040977), (53, 1540360), (97, 841640), (106, 770180), (194, 420820), (212, 385090), (265, 308072), (388, 210410), (397, 205640), (424, 192545), (485, 168328), (530, 154036), (776, 105205), (794, 102820), (970, 84164), (1060, 77018), (1588, 51410), (1940, 42082), (1985, 41128), (2120, 38509), (3176, 25705), (3880, 21041), (3970, 20564), (5141, 15880), (7940, 10282)]