21004720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23869}}^1$

素因数の和:23893

約数の個数: 40

約数和(自身を含む): 53277840

約数和(自身を除く): 32273120

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23869, 47738, 95476, 119345, 190952, 238690, 262559, 381904, 477380, 525118, 954760, 1050236, 1312795, 1909520, 2100472, 2625590, 4200944, 5251180, 10502360, 21004720]

約数ペア:

[(1, 21004720), (2, 10502360), (4, 5251180), (5, 4200944), (8, 2625590), (10, 2100472), (11, 1909520), (16, 1312795), (20, 1050236), (22, 954760), (40, 525118), (44, 477380), (55, 381904), (80, 262559), (88, 238690), (110, 190952), (176, 119345), (220, 95476), (440, 47738), (880, 23869)]