12721555

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 19243008

約数和(自身を除く): 6521453

約数列:

[1, 5, 7, 11, 35, 55, 77, 173, 191, 385, 865, 955, 1211, 1337, 1903, 2101, 6055, 6685, 9515, 10505, 13321, 14707, 33043, 66605, 73535, 165215, 231301, 363473, 1156505, 1817365, 2544311, 12721555]

約数ペア:

[(1, 12721555), (5, 2544311), (7, 1817365), (11, 1156505), (35, 363473), (55, 231301), (77, 165215), (173, 73535), (191, 66605), (385, 33043), (865, 14707), (955, 13321), (1211, 10505), (1337, 9515), (1903, 6685), (2101, 6055)]