81178840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{433}}^1$

素因数の和:596

約数の個数: 64

約数和(自身を含む): 189050400

約数和(自身を除く): 107871560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 109, 172, 215, 218, 344, 430, 433, 436, 545, 860, 866, 872, 1090, 1720, 1732, 2165, 2180, 3464, 4330, 4360, 4687, 8660, 9374, 17320, 18619, 18748, 23435, 37238, 37496, 46870, 47197, 74476, 93095, 93740, 94394, 148952, 186190, 187480, 188788, 235985, 372380, 377576, 471970, 744760, 943940, 1887880, 2029471, 4058942, 8117884, 10147355, 16235768, 20294710, 40589420, 81178840]

約数ペア:

[(1, 81178840), (2, 40589420), (4, 20294710), (5, 16235768), (8, 10147355), (10, 8117884), (20, 4058942), (40, 2029471), (43, 1887880), (86, 943940), (109, 744760), (172, 471970), (215, 377576), (218, 372380), (344, 235985), (430, 188788), (433, 187480), (436, 186190), (545, 148952), (860, 94394), (866, 93740), (872, 93095), (1090, 74476), (1720, 47197), (1732, 46870), (2165, 37496), (2180, 37238), (3464, 23435), (4330, 18748), (4360, 18619), (4687, 17320), (8660, 9374)]