20757568

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{409}}^1$

素因数の和:495

約数の個数: 56

約数和(自身を含む): 45196760

約数和(自身を除く): 24439192

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 61, 64, 104, 122, 208, 244, 409, 416, 488, 793, 818, 832, 976, 1586, 1636, 1952, 3172, 3272, 3904, 5317, 6344, 6544, 10634, 12688, 13088, 21268, 24949, 25376, 26176, 42536, 49898, 50752, 85072, 99796, 170144, 199592, 324337, 340288, 399184, 648674, 798368, 1297348, 1596736, 2594696, 5189392, 10378784, 20757568]

約数ペア:

[(1, 20757568), (2, 10378784), (4, 5189392), (8, 2594696), (13, 1596736), (16, 1297348), (26, 798368), (32, 648674), (52, 399184), (61, 340288), (64, 324337), (104, 199592), (122, 170144), (208, 99796), (244, 85072), (409, 50752), (416, 49898), (488, 42536), (793, 26176), (818, 25376), (832, 24949), (976, 21268), (1586, 13088), (1636, 12688), (1952, 10634), (3172, 6544), (3272, 6344), (3904, 5317)]