19914640

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2797}}^1$

素因数の和:2899

約数の個数: 40

約数和(自身を含む): 46838520

約数和(自身を除く): 26923880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2797, 3560, 5594, 7120, 11188, 13985, 22376, 27970, 44752, 55940, 111880, 223760, 248933, 497866, 995732, 1244665, 1991464, 2489330, 3982928, 4978660, 9957320, 19914640]

約数ペア:

[(1, 19914640), (2, 9957320), (4, 4978660), (5, 3982928), (8, 2489330), (10, 1991464), (16, 1244665), (20, 995732), (40, 497866), (80, 248933), (89, 223760), (178, 111880), (356, 55940), (445, 44752), (712, 27970), (890, 22376), (1424, 13985), (1780, 11188), (2797, 7120), (3560, 5594)]