21807380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2939}}^1$

素因数の和:3008

約数の個数: 48

約数和(自身を含む): 53343360

約数和(自身を除く): 31535980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2939, 3710, 5878, 7420, 11756, 14695, 20573, 29390, 41146, 58780, 82292, 102865, 155767, 205730, 311534, 411460, 623068, 778835, 1090369, 1557670, 2180738, 3115340, 4361476, 5451845, 10903690, 21807380]

約数ペア:

[(1, 21807380), (2, 10903690), (4, 5451845), (5, 4361476), (7, 3115340), (10, 2180738), (14, 1557670), (20, 1090369), (28, 778835), (35, 623068), (53, 411460), (70, 311534), (106, 205730), (140, 155767), (212, 102865), (265, 82292), (371, 58780), (530, 41146), (742, 29390), (1060, 20573), (1484, 14695), (1855, 11756), (2939, 7420), (3710, 5878)]