21248368

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{409}}^1$

素因数の和:625

約数の個数: 40

約数和(自身を含む): 43925760

約数和(自身を除く): 22677392

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 191, 272, 382, 409, 764, 818, 1528, 1636, 3056, 3247, 3272, 6494, 6544, 6953, 12988, 13906, 25976, 27812, 51952, 55624, 78119, 111248, 156238, 312476, 624952, 1249904, 1328023, 2656046, 5312092, 10624184, 21248368]

約数ペア:

[(1, 21248368), (2, 10624184), (4, 5312092), (8, 2656046), (16, 1328023), (17, 1249904), (34, 624952), (68, 312476), (136, 156238), (191, 111248), (272, 78119), (382, 55624), (409, 51952), (764, 27812), (818, 25976), (1528, 13906), (1636, 12988), (3056, 6953), (3247, 6544), (3272, 6494)]