21388450

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{13799}}^1$

素因数の和:13842

約数の個数: 24

約数和(自身を含む): 41068800

約数和(自身を除く): 19680350

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 775, 1550, 13799, 27598, 68995, 137990, 344975, 427769, 689950, 855538, 2138845, 4277690, 10694225, 21388450]

約数ペア:

[(1, 21388450), (2, 10694225), (5, 4277690), (10, 2138845), (25, 855538), (31, 689950), (50, 427769), (62, 344975), (155, 137990), (310, 68995), (775, 27598), (1550, 13799)]