74891720

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:402

約数の個数: 64

約数和(自身を含む): 172854000

約数和(自身を除く): 97962280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 109, 178, 193, 218, 356, 386, 436, 445, 545, 712, 772, 872, 890, 965, 1090, 1544, 1780, 1930, 2180, 3560, 3860, 4360, 7720, 9701, 17177, 19402, 21037, 34354, 38804, 42074, 48505, 68708, 77608, 84148, 85885, 97010, 105185, 137416, 168296, 171770, 194020, 210370, 343540, 388040, 420740, 687080, 841480, 1872293, 3744586, 7489172, 9361465, 14978344, 18722930, 37445860, 74891720]

約数ペア:

[(1, 74891720), (2, 37445860), (4, 18722930), (5, 14978344), (8, 9361465), (10, 7489172), (20, 3744586), (40, 1872293), (89, 841480), (109, 687080), (178, 420740), (193, 388040), (218, 343540), (356, 210370), (386, 194020), (436, 171770), (445, 168296), (545, 137416), (712, 105185), (772, 97010), (872, 85885), (890, 84148), (965, 77608), (1090, 68708), (1544, 48505), (1780, 42074), (1930, 38804), (2180, 34354), (3560, 21037), (3860, 19402), (4360, 17177), (7720, 9701)]