20913728

素因数分解:

$2^6\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{487}}^1$

素因数の和:571

約数の個数: 56

約数和(自身を含む): 46110144

約数和(自身を除く): 25196416

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 61, 64, 88, 122, 176, 244, 352, 487, 488, 671, 704, 974, 976, 1342, 1948, 1952, 2684, 3896, 3904, 5357, 5368, 7792, 10714, 10736, 15584, 21428, 21472, 29707, 31168, 42856, 42944, 59414, 85712, 118828, 171424, 237656, 326777, 342848, 475312, 653554, 950624, 1307108, 1901248, 2614216, 5228432, 10456864, 20913728]

約数ペア:

[(1, 20913728), (2, 10456864), (4, 5228432), (8, 2614216), (11, 1901248), (16, 1307108), (22, 950624), (32, 653554), (44, 475312), (61, 342848), (64, 326777), (88, 237656), (122, 171424), (176, 118828), (244, 85712), (352, 59414), (487, 42944), (488, 42856), (671, 31168), (704, 29707), (974, 21472), (976, 21428), (1342, 15584), (1948, 10736), (1952, 10714), (2684, 7792), (3896, 5368), (3904, 5357)]