20803937

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{691}}^1$

素因数の和:749

約数の個数: 32

約数和(自身を含む): 28698624

約数和(自身を除く): 7894687

約数列:

[1, 7, 11, 17, 23, 77, 119, 161, 187, 253, 391, 691, 1309, 1771, 2737, 4301, 4837, 7601, 11747, 15893, 30107, 53207, 82229, 111251, 129217, 174823, 270181, 904519, 1223761, 1891267, 2971991, 20803937]

約数ペア:

[(1, 20803937), (7, 2971991), (11, 1891267), (17, 1223761), (23, 904519), (77, 270181), (119, 174823), (161, 129217), (187, 111251), (253, 82229), (391, 53207), (691, 30107), (1309, 15893), (1771, 11747), (2737, 7601), (4301, 4837)]