20451488

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 21461152

約数列:

[1, 2, 4, 8, 16, 32, 43, 86, 89, 167, 172, 178, 334, 344, 356, 668, 688, 712, 1336, 1376, 1424, 2672, 2848, 3827, 5344, 7181, 7654, 14362, 14863, 15308, 28724, 29726, 30616, 57448, 59452, 61232, 114896, 118904, 122464, 229792, 237808, 475616, 639109, 1278218, 2556436, 5112872, 10225744, 20451488]

約数ペア:

[(1, 20451488), (2, 10225744), (4, 5112872), (8, 2556436), (16, 1278218), (32, 639109), (43, 475616), (86, 237808), (89, 229792), (167, 122464), (172, 118904), (178, 114896), (334, 61232), (344, 59452), (356, 57448), (668, 30616), (688, 29726), (712, 28724), (1336, 15308), (1376, 14863), (1424, 14362), (2672, 7654), (2848, 7181), (3827, 5344)]