17809720

素因数分解:

$2^3\times 5^1\times {\mathrm{541}}^1\times {\mathrm{823}}^1$

素因数の和:1375

約数の個数: 32

約数和(自身を含む): 40194720

約数和(自身を除く): 22385000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541, 823, 1082, 1646, 2164, 2705, 3292, 4115, 4328, 5410, 6584, 8230, 10820, 16460, 21640, 32920, 445243, 890486, 1780972, 2226215, 3561944, 4452430, 8904860, 17809720]

約数ペア:

[(1, 17809720), (2, 8904860), (4, 4452430), (5, 3561944), (8, 2226215), (10, 1780972), (20, 890486), (40, 445243), (541, 32920), (823, 21640), (1082, 16460), (1646, 10820), (2164, 8230), (2705, 6584), (3292, 5410), (4115, 4328)]