21786984961

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{263}}^1\times {\mathrm{4481}}^1$

素因数の和:4909

約数の個数: 32

約数和(自身を含む): 26504755200

約数和(自身を除く): 4717770239

約数列:

[1, 7, 19, 133, 139, 263, 973, 1841, 2641, 4481, 4997, 18487, 31367, 34979, 36557, 85139, 255899, 595973, 622859, 694583, 1178503, 4360013, 4862081, 8249521, 11834321, 22391557, 82840247, 156740899, 163811917, 1146683419, 3112426423, 21786984961]

約数ペア:

[(1, 21786984961), (7, 3112426423), (19, 1146683419), (133, 163811917), (139, 156740899), (263, 82840247), (973, 22391557), (1841, 11834321), (2641, 8249521), (4481, 4862081), (4997, 4360013), (18487, 1178503), (31367, 694583), (34979, 622859), (36557, 595973), (85139, 255899)]