21388000

素因数分解:

$2^5\times 5^3\times {\mathrm{5347}}^1$

素因数の和:5372

約数の個数: 48

約数和(自身を含む): 52560144

約数和(自身を除く): 31172144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5347, 10694, 21388, 26735, 42776, 53470, 85552, 106940, 133675, 171104, 213880, 267350, 427760, 534700, 668375, 855520, 1069400, 1336750, 2138800, 2673500, 4277600, 5347000, 10694000, 21388000]

約数ペア:

[(1, 21388000), (2, 10694000), (4, 5347000), (5, 4277600), (8, 2673500), (10, 2138800), (16, 1336750), (20, 1069400), (25, 855520), (32, 668375), (40, 534700), (50, 427760), (80, 267350), (100, 213880), (125, 171104), (160, 133675), (200, 106940), (250, 85552), (400, 53470), (500, 42776), (800, 26735), (1000, 21388), (2000, 10694), (4000, 5347)]