21383900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{4973}}^1$

素因数の和:5030

約数の個数: 36

約数和(自身を含む): 47491752

約数和(自身を除く): 26107852

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 4973, 9946, 19892, 24865, 49730, 99460, 124325, 213839, 248650, 427678, 497300, 855356, 1069195, 2138390, 4276780, 5345975, 10691950, 21383900]

約数ペア:

[(1, 21383900), (2, 10691950), (4, 5345975), (5, 4276780), (10, 2138390), (20, 1069195), (25, 855356), (43, 497300), (50, 427678), (86, 248650), (100, 213839), (172, 124325), (215, 99460), (430, 49730), (860, 24865), (1075, 19892), (2150, 9946), (4300, 4973)]