20394080

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:292

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 35489440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 131, 139, 140, 160, 224, 262, 278, 280, 524, 556, 560, 655, 695, 917, 973, 1048, 1112, 1120, 1310, 1390, 1834, 1946, 2096, 2224, 2620, 2780, 3668, 3892, 4192, 4448, 4585, 4865, 5240, 5560, 7336, 7784, 9170, 9730, 10480, 11120, 14672, 15568, 18209, 18340, 19460, 20960, 22240, 29344, 31136, 36418, 36680, 38920, 72836, 73360, 77840, 91045, 127463, 145672, 146720, 155680, 182090, 254926, 291344, 364180, 509852, 582688, 637315, 728360, 1019704, 1274630, 1456720, 2039408, 2549260, 2913440, 4078816, 5098520, 10197040, 20394080]

約数ペア:

[(1, 20394080), (2, 10197040), (4, 5098520), (5, 4078816), (7, 2913440), (8, 2549260), (10, 2039408), (14, 1456720), (16, 1274630), (20, 1019704), (28, 728360), (32, 637315), (35, 582688), (40, 509852), (56, 364180), (70, 291344), (80, 254926), (112, 182090), (131, 155680), (139, 146720), (140, 145672), (160, 127463), (224, 91045), (262, 77840), (278, 73360), (280, 72836), (524, 38920), (556, 36680), (560, 36418), (655, 31136), (695, 29344), (917, 22240), (973, 20960), (1048, 19460), (1112, 18340), (1120, 18209), (1310, 15568), (1390, 14672), (1834, 11120), (1946, 10480), (2096, 9730), (2224, 9170), (2620, 7784), (2780, 7336), (3668, 5560), (3892, 5240), (4192, 4865), (4448, 4585)]