21166660

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{311}}^1$

素因数の和:444

約数の個数: 48

約数和(自身を含む): 46230912

約数和(自身を除く): 25064252

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 83, 164, 166, 205, 311, 332, 410, 415, 622, 820, 830, 1244, 1555, 1660, 3110, 3403, 6220, 6806, 12751, 13612, 17015, 25502, 25813, 34030, 51004, 51626, 63755, 68060, 103252, 127510, 129065, 255020, 258130, 516260, 1058333, 2116666, 4233332, 5291665, 10583330, 21166660]

約数ペア:

[(1, 21166660), (2, 10583330), (4, 5291665), (5, 4233332), (10, 2116666), (20, 1058333), (41, 516260), (82, 258130), (83, 255020), (164, 129065), (166, 127510), (205, 103252), (311, 68060), (332, 63755), (410, 51626), (415, 51004), (622, 34030), (820, 25813), (830, 25502), (1244, 17015), (1555, 13612), (1660, 12751), (3110, 6806), (3403, 6220)]