20402390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{643}}^1$

素因数の和:836

約数の個数: 32

約数和(自身を含む): 38949120

約数和(自身を除く): 18546730

約数列:

[1, 2, 5, 10, 19, 38, 95, 167, 190, 334, 643, 835, 1286, 1670, 3173, 3215, 6346, 6430, 12217, 15865, 24434, 31730, 61085, 107381, 122170, 214762, 536905, 1073810, 2040239, 4080478, 10201195, 20402390]

約数ペア:

[(1, 20402390), (2, 10201195), (5, 4080478), (10, 2040239), (19, 1073810), (38, 536905), (95, 214762), (167, 122170), (190, 107381), (334, 61085), (643, 31730), (835, 24434), (1286, 15865), (1670, 12217), (3173, 6430), (3215, 6346)]