21489280

素因数分解:

$2^7\times 5^1\times {\mathrm{33577}}^1$

素因数の和:33596

約数の個数: 32

約数和(自身を含む): 51374340

約数和(自身を除く): 29885060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33577, 67154, 134308, 167885, 268616, 335770, 537232, 671540, 1074464, 1343080, 2148928, 2686160, 4297856, 5372320, 10744640, 21489280]

約数ペア:

[(1, 21489280), (2, 10744640), (4, 5372320), (5, 4297856), (8, 2686160), (10, 2148928), (16, 1343080), (20, 1074464), (32, 671540), (40, 537232), (64, 335770), (80, 268616), (128, 167885), (160, 134308), (320, 67154), (640, 33577)]