21879880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49727}}^1$

素因数の和:49749

約数の個数: 32

約数和(自身を含む): 53706240

約数和(自身を除く): 31826360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49727, 99454, 198908, 248635, 397816, 497270, 546997, 994540, 1093994, 1989080, 2187988, 2734985, 4375976, 5469970, 10939940, 21879880]

約数ペア:

[(1, 21879880), (2, 10939940), (4, 5469970), (5, 4375976), (8, 2734985), (10, 2187988), (11, 1989080), (20, 1093994), (22, 994540), (40, 546997), (44, 497270), (55, 397816), (88, 248635), (110, 198908), (220, 99454), (440, 49727)]