21149990

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72931}}^1$

素因数の和:72967

約数の個数: 16

約数和(自身を含む): 39383280

約数和(自身を除く): 18233290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72931, 145862, 364655, 729310, 2114999, 4229998, 10574995, 21149990]

約数ペア:

[(1, 21149990), (2, 10574995), (5, 4229998), (10, 2114999), (29, 729310), (58, 364655), (145, 145862), (290, 72931)]