20019725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1693}}^1$

素因数の和:1757

約数の個数: 24

約数和(自身を含む): 27727392

約数和(自身を除く): 7707667

約数列:

[1, 5, 11, 25, 43, 55, 215, 275, 473, 1075, 1693, 2365, 8465, 11825, 18623, 42325, 72799, 93115, 363995, 465575, 800789, 1819975, 4003945, 20019725]

約数ペア:

[(1, 20019725), (5, 4003945), (11, 1819975), (25, 800789), (43, 465575), (55, 363995), (215, 93115), (275, 72799), (473, 42325), (1075, 18623), (1693, 11825), (2365, 8465)]