21000887948

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{941}}^1\times {\mathrm{2851}}^1$

素因数の和:3918

約数の個数: 48

約数和(自身を含む): 39116663040

約数和(自身を除く): 18115775092

約数列:

[1, 2, 4, 19, 38, 76, 103, 206, 412, 941, 1882, 1957, 2851, 3764, 3914, 5702, 7828, 11404, 17879, 35758, 54169, 71516, 96923, 108338, 193846, 216676, 293653, 387692, 587306, 1174612, 1841537, 2682791, 3683074, 5365582, 5579407, 7366148, 10731164, 11158814, 22317628, 50973029, 101946058, 203892116, 276327473, 552654946, 1105309892, 5250221987, 10500443974, 21000887948]

約数ペア:

[(1, 21000887948), (2, 10500443974), (4, 5250221987), (19, 1105309892), (38, 552654946), (76, 276327473), (103, 203892116), (206, 101946058), (412, 50973029), (941, 22317628), (1882, 11158814), (1957, 10731164), (2851, 7366148), (3764, 5579407), (3914, 5365582), (5702, 3683074), (7828, 2682791), (11404, 1841537), (17879, 1174612), (35758, 587306), (54169, 387692), (71516, 293653), (96923, 216676), (108338, 193846)]