21911780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{727}}^1$

素因数の和:884

約数の個数: 48

約数和(自身を含む): 50633856

約数和(自身を除く): 28722076

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 137, 220, 274, 548, 685, 727, 1370, 1454, 1507, 2740, 2908, 3014, 3635, 6028, 7270, 7535, 7997, 14540, 15070, 15994, 30140, 31988, 39985, 79970, 99599, 159940, 199198, 398396, 497995, 995990, 1095589, 1991980, 2191178, 4382356, 5477945, 10955890, 21911780]

約数ペア:

[(1, 21911780), (2, 10955890), (4, 5477945), (5, 4382356), (10, 2191178), (11, 1991980), (20, 1095589), (22, 995990), (44, 497995), (55, 398396), (110, 199198), (137, 159940), (220, 99599), (274, 79970), (548, 39985), (685, 31988), (727, 30140), (1370, 15994), (1454, 15070), (1507, 14540), (2740, 7997), (2908, 7535), (3014, 7270), (3635, 6028)]