21789904

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{311}}^1$

素因数の和:499

約数の個数: 40

約数和(自身を含む): 44104320

約数和(自身を除く): 22314416

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 151, 232, 302, 311, 464, 604, 622, 1208, 1244, 2416, 2488, 4379, 4976, 8758, 9019, 17516, 18038, 35032, 36076, 46961, 70064, 72152, 93922, 144304, 187844, 375688, 751376, 1361869, 2723738, 5447476, 10894952, 21789904]

約数ペア:

[(1, 21789904), (2, 10894952), (4, 5447476), (8, 2723738), (16, 1361869), (29, 751376), (58, 375688), (116, 187844), (151, 144304), (232, 93922), (302, 72152), (311, 70064), (464, 46961), (604, 36076), (622, 35032), (1208, 18038), (1244, 17516), (2416, 9019), (2488, 8758), (4379, 4976)]