21259430

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{23887}}^1$

素因数の和:23983

約数の個数: 16

約数和(自身を含む): 38698560

約数和(自身を除く): 17439130

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 23887, 47774, 119435, 238870, 2125943, 4251886, 10629715, 21259430]

約数ペア:

[(1, 21259430), (2, 10629715), (5, 4251886), (10, 2125943), (89, 238870), (178, 119435), (445, 47774), (890, 23887)]