21569272

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{239}}^1\times {\mathrm{389}}^1$

素因数の和:663

約数の個数: 32

約数和(自身を含む): 42120000

約数和(自身を除く): 20550728

約数列:

[1, 2, 4, 8, 29, 58, 116, 232, 239, 389, 478, 778, 956, 1556, 1912, 3112, 6931, 11281, 13862, 22562, 27724, 45124, 55448, 90248, 92971, 185942, 371884, 743768, 2696159, 5392318, 10784636, 21569272]

約数ペア:

[(1, 21569272), (2, 10784636), (4, 5392318), (8, 2696159), (29, 743768), (58, 371884), (116, 185942), (232, 92971), (239, 90248), (389, 55448), (478, 45124), (778, 27724), (956, 22562), (1556, 13862), (1912, 11281), (3112, 6931)]