21139880

素因数分解:

$2^3\times 5^1\times {\mathrm{191}}^1\times {\mathrm{2767}}^1$

素因数の和:2969

約数の個数: 32

約数和(自身を含む): 47831040

約数和(自身を除く): 26691160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 2767, 3820, 5534, 7640, 11068, 13835, 22136, 27670, 55340, 110680, 528497, 1056994, 2113988, 2642485, 4227976, 5284970, 10569940, 21139880]

約数ペア:

[(1, 21139880), (2, 10569940), (4, 5284970), (5, 4227976), (8, 2642485), (10, 2113988), (20, 1056994), (40, 528497), (191, 110680), (382, 55340), (764, 27670), (955, 22136), (1528, 13835), (1910, 11068), (2767, 7640), (3820, 5534)]