18809705

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{983}}^1$

素因数の和:1120

約数の個数: 16

約数和(自身を含む): 23379840

約数和(自身を除く): 4570135

約数列:

[1, 5, 43, 89, 215, 445, 983, 3827, 4915, 19135, 42269, 87487, 211345, 437435, 3761941, 18809705]

約数ペア:

[(1, 18809705), (5, 3761941), (43, 437435), (89, 211345), (215, 87487), (445, 42269), (983, 19135), (3827, 4915)]