21508340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2293}}^1$

素因数の和:2376

約数の個数: 48

約数和(自身を含む): 52413312

約数和(自身を除く): 30904972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 2293, 2345, 4586, 4690, 9172, 9380, 11465, 16051, 22930, 32102, 45860, 64204, 80255, 153631, 160510, 307262, 321020, 614524, 768155, 1075417, 1536310, 2150834, 3072620, 4301668, 5377085, 10754170, 21508340]

約数ペア:

[(1, 21508340), (2, 10754170), (4, 5377085), (5, 4301668), (7, 3072620), (10, 2150834), (14, 1536310), (20, 1075417), (28, 768155), (35, 614524), (67, 321020), (70, 307262), (134, 160510), (140, 153631), (268, 80255), (335, 64204), (469, 45860), (670, 32102), (938, 22930), (1340, 16051), (1876, 11465), (2293, 9380), (2345, 9172), (4586, 4690)]