21376360

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17239}}^1$

素因数の和:17281

約数の個数: 32

約数和(自身を含む): 49651200

約数和(自身を除く): 28274840

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17239, 34478, 68956, 86195, 137912, 172390, 344780, 534409, 689560, 1068818, 2137636, 2672045, 4275272, 5344090, 10688180, 21376360]

約数ペア:

[(1, 21376360), (2, 10688180), (4, 5344090), (5, 4275272), (8, 2672045), (10, 2137636), (20, 1068818), (31, 689560), (40, 534409), (62, 344780), (124, 172390), (155, 137912), (248, 86195), (310, 68956), (620, 34478), (1240, 17239)]