20720128

素因数分解:

$2^9\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{283}}^1$

素因数の和:325

約数の個数: 80

約数和(自身を含む): 48809376

約数和(自身を除く): 28089248

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 32, 44, 52, 64, 88, 104, 128, 143, 176, 208, 256, 283, 286, 352, 416, 512, 566, 572, 704, 832, 1132, 1144, 1408, 1664, 2264, 2288, 2816, 3113, 3328, 3679, 4528, 4576, 5632, 6226, 6656, 7358, 9056, 9152, 12452, 14716, 18112, 18304, 24904, 29432, 36224, 36608, 40469, 49808, 58864, 72448, 73216, 80938, 99616, 117728, 144896, 161876, 199232, 235456, 323752, 398464, 470912, 647504, 796928, 941824, 1295008, 1593856, 1883648, 2590016, 5180032, 10360064, 20720128]

約数ペア:

[(1, 20720128), (2, 10360064), (4, 5180032), (8, 2590016), (11, 1883648), (13, 1593856), (16, 1295008), (22, 941824), (26, 796928), (32, 647504), (44, 470912), (52, 398464), (64, 323752), (88, 235456), (104, 199232), (128, 161876), (143, 144896), (176, 117728), (208, 99616), (256, 80938), (283, 73216), (286, 72448), (352, 58864), (416, 49808), (512, 40469), (566, 36608), (572, 36224), (704, 29432), (832, 24904), (1132, 18304), (1144, 18112), (1408, 14716), (1664, 12452), (2264, 9152), (2288, 9056), (2816, 7358), (3113, 6656), (3328, 6226), (3679, 5632), (4528, 4576)]