21501305

素因数分解:

$5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 30668544

約数和(自身を除く): 9167239

約数列:

[1, 5, 7, 35, 53, 67, 173, 265, 335, 371, 469, 865, 1211, 1855, 2345, 3551, 6055, 9169, 11591, 17755, 24857, 45845, 57955, 64183, 81137, 124285, 320915, 405685, 614323, 3071615, 4300261, 21501305]

約数ペア:

[(1, 21501305), (5, 4300261), (7, 3071615), (35, 614323), (53, 405685), (67, 320915), (173, 124285), (265, 81137), (335, 64183), (371, 57955), (469, 45845), (865, 24857), (1211, 17755), (1855, 11591), (2345, 9169), (3551, 6055)]