81541880

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{41603}}^1$

素因数の和:41628

約数の個数: 48

約数和(自身を含む): 213428520

約数和(自身を除く): 131886640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 41603, 83206, 166412, 208015, 291221, 332824, 416030, 582442, 832060, 1164884, 1456105, 1664120, 2038547, 2329768, 2912210, 4077094, 5824420, 8154188, 10192735, 11648840, 16308376, 20385470, 40770940, 81541880]

約数ペア:

[(1, 81541880), (2, 40770940), (4, 20385470), (5, 16308376), (7, 11648840), (8, 10192735), (10, 8154188), (14, 5824420), (20, 4077094), (28, 2912210), (35, 2329768), (40, 2038547), (49, 1664120), (56, 1456105), (70, 1164884), (98, 832060), (140, 582442), (196, 416030), (245, 332824), (280, 291221), (392, 208015), (490, 166412), (980, 83206), (1960, 41603)]