21321768880

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1788739}}^1$

素因数の和:1788901

約数の個数: 40

約数和(自身を含む): 49905846000

約数和(自身を除く): 28584077120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 2384, 2980, 5960, 11920, 1788739, 3577478, 7154956, 8943695, 14309912, 17887390, 28619824, 35774780, 71549560, 143099120, 266522111, 533044222, 1066088444, 1332610555, 2132176888, 2665221110, 4264353776, 5330442220, 10660884440, 21321768880]

約数ペア:

[(1, 21321768880), (2, 10660884440), (4, 5330442220), (5, 4264353776), (8, 2665221110), (10, 2132176888), (16, 1332610555), (20, 1066088444), (40, 533044222), (80, 266522111), (149, 143099120), (298, 71549560), (596, 35774780), (745, 28619824), (1192, 17887390), (1490, 14309912), (2384, 8943695), (2980, 7154956), (5960, 3577478), (11920, 1788739)]