21392840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76403}}^1$

素因数の和:76421

約数の個数: 32

約数和(自身を含む): 55010880

約数和(自身を除く): 33618040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76403, 152806, 305612, 382015, 534821, 611224, 764030, 1069642, 1528060, 2139284, 2674105, 3056120, 4278568, 5348210, 10696420, 21392840]

約数ペア:

[(1, 21392840), (2, 10696420), (4, 5348210), (5, 4278568), (7, 3056120), (8, 2674105), (10, 2139284), (14, 1528060), (20, 1069642), (28, 764030), (35, 611224), (40, 534821), (56, 382015), (70, 305612), (140, 152806), (280, 76403)]