157720520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{1493}}^1$

素因数の和:1662

約数の個数: 64

約数和(自身を含む): 376488000

約数和(自身を除く): 218767480

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 139, 152, 190, 278, 380, 556, 695, 760, 1112, 1390, 1493, 2641, 2780, 2986, 5282, 5560, 5972, 7465, 10564, 11944, 13205, 14930, 21128, 26410, 28367, 29860, 52820, 56734, 59720, 105640, 113468, 141835, 207527, 226936, 283670, 415054, 567340, 830108, 1037635, 1134680, 1660216, 2075270, 3943013, 4150540, 7886026, 8301080, 15772052, 19715065, 31544104, 39430130, 78860260, 157720520]

約数ペア:

[(1, 157720520), (2, 78860260), (4, 39430130), (5, 31544104), (8, 19715065), (10, 15772052), (19, 8301080), (20, 7886026), (38, 4150540), (40, 3943013), (76, 2075270), (95, 1660216), (139, 1134680), (152, 1037635), (190, 830108), (278, 567340), (380, 415054), (556, 283670), (695, 226936), (760, 207527), (1112, 141835), (1390, 113468), (1493, 105640), (2641, 59720), (2780, 56734), (2986, 52820), (5282, 29860), (5560, 28367), (5972, 26410), (7465, 21128), (10564, 14930), (11944, 13205)]