21708520

素因数分解:

$2^3\times 5^1\times {\mathrm{542713}}^1$

素因数の和:542724

約数の個数: 16

約数和(自身を含む): 48844260

約数和(自身を除く): 27135740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542713, 1085426, 2170852, 2713565, 4341704, 5427130, 10854260, 21708520]

約数ペア:

[(1, 21708520), (2, 10854260), (4, 5427130), (5, 4341704), (8, 2713565), (10, 2170852), (20, 1085426), (40, 542713)]