20539904

素因数分解:

$2^9\times 7^1\times {\mathrm{11}}^1\times {\mathrm{521}}^1$

素因数の和:557

約数の個数: 80

約数和(自身を含む): 51264576

約数和(自身を除く): 30724672

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 64, 77, 88, 112, 128, 154, 176, 224, 256, 308, 352, 448, 512, 521, 616, 704, 896, 1042, 1232, 1408, 1792, 2084, 2464, 2816, 3584, 3647, 4168, 4928, 5632, 5731, 7294, 8336, 9856, 11462, 14588, 16672, 19712, 22924, 29176, 33344, 39424, 40117, 45848, 58352, 66688, 80234, 91696, 116704, 133376, 160468, 183392, 233408, 266752, 320936, 366784, 466816, 641872, 733568, 933632, 1283744, 1467136, 1867264, 2567488, 2934272, 5134976, 10269952, 20539904]

約数ペア:

[(1, 20539904), (2, 10269952), (4, 5134976), (7, 2934272), (8, 2567488), (11, 1867264), (14, 1467136), (16, 1283744), (22, 933632), (28, 733568), (32, 641872), (44, 466816), (56, 366784), (64, 320936), (77, 266752), (88, 233408), (112, 183392), (128, 160468), (154, 133376), (176, 116704), (224, 91696), (256, 80234), (308, 66688), (352, 58352), (448, 45848), (512, 40117), (521, 39424), (616, 33344), (704, 29176), (896, 22924), (1042, 19712), (1232, 16672), (1408, 14588), (1792, 11462), (2084, 9856), (2464, 8336), (2816, 7294), (3584, 5731), (3647, 5632), (4168, 4928)]