21365968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{739}}^1$

素因数の和:899

約数の個数: 40

約数和(自身を含む): 44962400

約数和(自身を除く): 23596432

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 139, 208, 278, 556, 739, 1112, 1478, 1807, 2224, 2956, 3614, 5912, 7228, 9607, 11824, 14456, 19214, 28912, 38428, 76856, 102721, 153712, 205442, 410884, 821768, 1335373, 1643536, 2670746, 5341492, 10682984, 21365968]

約数ペア:

[(1, 21365968), (2, 10682984), (4, 5341492), (8, 2670746), (13, 1643536), (16, 1335373), (26, 821768), (52, 410884), (104, 205442), (139, 153712), (208, 102721), (278, 76856), (556, 38428), (739, 28912), (1112, 19214), (1478, 14456), (1807, 11824), (2224, 9607), (2956, 7228), (3614, 5912)]