72788020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1\times {\mathrm{193}}^1$

素因数の和:484

約数の個数: 48

約数和(自身を含む): 155952720

約数和(自身を除く): 83164700

約数列:

[1, 2, 4, 5, 10, 20, 109, 173, 193, 218, 346, 386, 436, 545, 692, 772, 865, 965, 1090, 1730, 1930, 2180, 3460, 3860, 18857, 21037, 33389, 37714, 42074, 66778, 75428, 84148, 94285, 105185, 133556, 166945, 188570, 210370, 333890, 377140, 420740, 667780, 3639401, 7278802, 14557604, 18197005, 36394010, 72788020]

約数ペア:

[(1, 72788020), (2, 36394010), (4, 18197005), (5, 14557604), (10, 7278802), (20, 3639401), (109, 667780), (173, 420740), (193, 377140), (218, 333890), (346, 210370), (386, 188570), (436, 166945), (545, 133556), (692, 105185), (772, 94285), (865, 84148), (965, 75428), (1090, 66778), (1730, 42074), (1930, 37714), (2180, 33389), (3460, 21037), (3860, 18857)]