19757738

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:243

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 20884822

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 71, 77, 91, 139, 142, 143, 154, 182, 278, 286, 497, 781, 923, 973, 994, 1001, 1529, 1562, 1807, 1846, 1946, 2002, 3058, 3614, 5467, 6461, 9869, 10153, 10703, 10934, 12649, 12922, 19738, 19877, 20306, 21406, 25298, 39754, 69083, 71071, 108559, 128297, 138166, 139139, 142142, 217118, 256594, 278278, 759913, 898079, 1411267, 1519826, 1796158, 2822534, 9878869, 19757738]

約数ペア:

[(1, 19757738), (2, 9878869), (7, 2822534), (11, 1796158), (13, 1519826), (14, 1411267), (22, 898079), (26, 759913), (71, 278278), (77, 256594), (91, 217118), (139, 142142), (142, 139139), (143, 138166), (154, 128297), (182, 108559), (278, 71071), (286, 69083), (497, 39754), (781, 25298), (923, 21406), (973, 20306), (994, 19877), (1001, 19738), (1529, 12922), (1562, 12649), (1807, 10934), (1846, 10703), (1946, 10153), (2002, 9869), (3058, 6461), (3614, 5467)]