21565016

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 25004584

約数列:

[1, 2, 4, 8, 11, 22, 41, 43, 44, 82, 86, 88, 139, 164, 172, 278, 328, 344, 451, 473, 556, 902, 946, 1112, 1529, 1763, 1804, 1892, 3058, 3526, 3608, 3784, 5699, 5977, 6116, 7052, 11398, 11954, 12232, 14104, 19393, 22796, 23908, 38786, 45592, 47816, 62689, 65747, 77572, 125378, 131494, 155144, 245057, 250756, 262988, 490114, 501512, 525976, 980228, 1960456, 2695627, 5391254, 10782508, 21565016]

約数ペア:

[(1, 21565016), (2, 10782508), (4, 5391254), (8, 2695627), (11, 1960456), (22, 980228), (41, 525976), (43, 501512), (44, 490114), (82, 262988), (86, 250756), (88, 245057), (139, 155144), (164, 131494), (172, 125378), (278, 77572), (328, 65747), (344, 62689), (451, 47816), (473, 45592), (556, 38786), (902, 23908), (946, 22796), (1112, 19393), (1529, 14104), (1763, 12232), (1804, 11954), (1892, 11398), (3058, 7052), (3526, 6116), (3608, 5977), (3784, 5699)]