81017660

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{1091}}^1$

素因数の和:1226

約数の個数: 48

約数和(自身を含む): 176117760

約数和(自身を除く): 95100100

約数列:

[1, 2, 4, 5, 10, 20, 47, 79, 94, 158, 188, 235, 316, 395, 470, 790, 940, 1091, 1580, 2182, 3713, 4364, 5455, 7426, 10910, 14852, 18565, 21820, 37130, 51277, 74260, 86189, 102554, 172378, 205108, 256385, 344756, 430945, 512770, 861890, 1025540, 1723780, 4050883, 8101766, 16203532, 20254415, 40508830, 81017660]

約数ペア:

[(1, 81017660), (2, 40508830), (4, 20254415), (5, 16203532), (10, 8101766), (20, 4050883), (47, 1723780), (79, 1025540), (94, 861890), (158, 512770), (188, 430945), (235, 344756), (316, 256385), (395, 205108), (470, 172378), (790, 102554), (940, 86189), (1091, 74260), (1580, 51277), (2182, 37130), (3713, 21820), (4364, 18565), (5455, 14852), (7426, 10910)]