21678560

素因数分解:

$2^5\times 5^1\times {\mathrm{157}}^1\times {\mathrm{863}}^1$

素因数の和:1035

約数の個数: 48

約数和(自身を含む): 51601536

約数和(自身を除く): 29922976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 157, 160, 314, 628, 785, 863, 1256, 1570, 1726, 2512, 3140, 3452, 4315, 5024, 6280, 6904, 8630, 12560, 13808, 17260, 25120, 27616, 34520, 69040, 135491, 138080, 270982, 541964, 677455, 1083928, 1354910, 2167856, 2709820, 4335712, 5419640, 10839280, 21678560]

約数ペア:

[(1, 21678560), (2, 10839280), (4, 5419640), (5, 4335712), (8, 2709820), (10, 2167856), (16, 1354910), (20, 1083928), (32, 677455), (40, 541964), (80, 270982), (157, 138080), (160, 135491), (314, 69040), (628, 34520), (785, 27616), (863, 25120), (1256, 17260), (1570, 13808), (1726, 12560), (2512, 8630), (3140, 6904), (3452, 6280), (4315, 5024)]