21381716

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{3533}}^1$

素因数の和:3643

約数の個数: 24

約数和(自身を含む): 40075560

約数和(自身を除く): 18693844

約数列:

[1, 2, 4, 17, 34, 68, 89, 178, 356, 1513, 3026, 3533, 6052, 7066, 14132, 60061, 120122, 240244, 314437, 628874, 1257748, 5345429, 10690858, 21381716]

約数ペア:

[(1, 21381716), (2, 10690858), (4, 5345429), (17, 1257748), (34, 628874), (68, 314437), (89, 240244), (178, 120122), (356, 60061), (1513, 14132), (3026, 7066), (3533, 6052)]