20401472020

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{461}}^1\times {\mathrm{15919}}^1$

素因数の和:16528

約数の個数: 48

約数和(自身を含む): 43247635200

約数和(自身を除く): 22846163180

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 461, 556, 695, 922, 1390, 1844, 2305, 2780, 4610, 9220, 15919, 31838, 63676, 64079, 79595, 128158, 159190, 256316, 318380, 320395, 640790, 1281580, 2212741, 4425482, 7338659, 8850964, 11063705, 14677318, 22127410, 29354636, 36693295, 44254820, 73386590, 146773180, 1020073601, 2040147202, 4080294404, 5100368005, 10200736010, 20401472020]

約数ペア:

[(1, 20401472020), (2, 10200736010), (4, 5100368005), (5, 4080294404), (10, 2040147202), (20, 1020073601), (139, 146773180), (278, 73386590), (461, 44254820), (556, 36693295), (695, 29354636), (922, 22127410), (1390, 14677318), (1844, 11063705), (2305, 8850964), (2780, 7338659), (4610, 4425482), (9220, 2212741), (15919, 1281580), (31838, 640790), (63676, 320395), (64079, 318380), (79595, 256316), (128158, 159190)]