21219580

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2939}}^1$

素因数の和:2986

約数の個数: 36

約数和(自身を含む): 47045880

約数和(自身を除く): 25826300

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 2939, 3610, 5878, 7220, 11756, 14695, 29390, 55841, 58780, 111682, 223364, 279205, 558410, 1060979, 1116820, 2121958, 4243916, 5304895, 10609790, 21219580]

約数ペア:

[(1, 21219580), (2, 10609790), (4, 5304895), (5, 4243916), (10, 2121958), (19, 1116820), (20, 1060979), (38, 558410), (76, 279205), (95, 223364), (190, 111682), (361, 58780), (380, 55841), (722, 29390), (1444, 14695), (1805, 11756), (2939, 7220), (3610, 5878)]