21528820

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{619}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 47496960

約数和(自身を除く): 25968140

約数列:

[1, 2, 4, 5, 10, 20, 37, 47, 74, 94, 148, 185, 188, 235, 370, 470, 619, 740, 940, 1238, 1739, 2476, 3095, 3478, 6190, 6956, 8695, 12380, 17390, 22903, 29093, 34780, 45806, 58186, 91612, 114515, 116372, 145465, 229030, 290930, 458060, 581860, 1076441, 2152882, 4305764, 5382205, 10764410, 21528820]

約数ペア:

[(1, 21528820), (2, 10764410), (4, 5382205), (5, 4305764), (10, 2152882), (20, 1076441), (37, 581860), (47, 458060), (74, 290930), (94, 229030), (148, 145465), (185, 116372), (188, 114515), (235, 91612), (370, 58186), (470, 45806), (619, 34780), (740, 29093), (940, 22903), (1238, 17390), (1739, 12380), (2476, 8695), (3095, 6956), (3478, 6190)]