21556816

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1933}}^1$

素因数の和:1999

約数の個数: 40

約数和(自身を含む): 45325224

約数和(自身を除く): 23768408

約数列:

[1, 2, 4, 8, 16, 17, 34, 41, 68, 82, 136, 164, 272, 328, 656, 697, 1394, 1933, 2788, 3866, 5576, 7732, 11152, 15464, 30928, 32861, 65722, 79253, 131444, 158506, 262888, 317012, 525776, 634024, 1268048, 1347301, 2694602, 5389204, 10778408, 21556816]

約数ペア:

[(1, 21556816), (2, 10778408), (4, 5389204), (8, 2694602), (16, 1347301), (17, 1268048), (34, 634024), (41, 525776), (68, 317012), (82, 262888), (136, 158506), (164, 131444), (272, 79253), (328, 65722), (656, 32861), (697, 30928), (1394, 15464), (1933, 11152), (2788, 7732), (3866, 5576)]