21839870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12923}}^1$

素因数の和:12956

約数の個数: 24

約数和(自身を含む): 42571656

約数和(自身を除く): 20731786

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12923, 25846, 64615, 129230, 167999, 335998, 839995, 1679990, 2183987, 4367974, 10919935, 21839870]

約数ペア:

[(1, 21839870), (2, 10919935), (5, 4367974), (10, 2183987), (13, 1679990), (26, 839995), (65, 335998), (130, 167999), (169, 129230), (338, 64615), (845, 25846), (1690, 12923)]